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Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Mar. 31, 2018	May 25, 2018	Sep. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K/A
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	pdvw
Entity Registrant Name	pdvWireless, Inc.
Entity Central Index Key	0001304492
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Public Float			$ 199,935,916.90
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		14,496,617

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Current Assets
Cash and cash equivalents	$ 98,318	$ 124,083
Accounts receivable, net of allowance for doubtful accounts of $29 and $53, respectively	935	636
Inventory	173	128
Prepaid expenses and other current assets	850	874
Total current assets	100,276	125,721
Property and equipment	12,775	14,509
Intangible assets	106,606	104,676
Capitalized patent costs, net	197	210
Other assets	486	370
Total assets	220,340	245,486
Current liabilities
Accounts payable and accrued expenses	4,322	3,399
Accounts payable - officers	94	36
Current portion of note payable		497
Deferred revenue	813	789
Total current liabilities	5,229	4,721
Noncurrent liabilities
Deferred revenue	4,257	5,033
Deferred income taxes		6,498
Other liabilities	2,325	1,338
Total liabilities	11,811	17,590
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.0001 par value per share, 10,000,000 shares authorized and no shares outstanding at March 31, 2018 and March 31, 2017
Common stock, $0.0001 par value per share, 100,000,000 shares authorized and 14,487,650 shares issued and outstanding at March 31, 2018 and 14,358,564 shares issued and outstanding at March 31, 2017	1	1
Additional paid-in capital	335,767	330,566
Accumulated deficit	(127,239)	(102,671)
Total stockholders' equity	208,529	227,896
Total liabilities and stockholders' equity	$ 220,340	$ 245,486

Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2018	Mar. 31, 2017
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 29,000	$ 53,000
Preferred Stock, par value	$ 0.0001	$ 0.0001
Preferred Stock, shares authorized	10,000,000	10,000,000
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.0001	$ 0.0001
Common Stock, shares authorized	100,000,000	100,000,000
Common Stock, shares issued	14,487,650	14,358,564
Common Stock, shares outstanding	14,487,650	14,358,564

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Operating revenues
Spectrum lease revenue	$ 729	$ 729	$ 729
Other revenue	830	440	190
Total operating revenues	6,355	4,787	3,544
Cost of revenue
Sales and service	7,898	7,049	3,469
Gross (loss) profit	(1,543)	(2,262)	75
Operating expenses
General and administrative	20,864	22,553	16,726
Sales and support	6,967	5,652	3,956
Product development	2,352	2,316	1,323
Total operating expenses	30,183	30,521	22,005
Loss from operations	(31,726)	(32,783)	(21,930)
Interest expense	(3)	(5)	(3)
Interest income	741	128	104
Other income (expense)	(78)	(28)	1
Loss before income taxes	(31,066)	(32,688)	(21,828)
Income tax expense (benefit)	(6,498)	6,498
Net loss	$ (24,568)	$ (39,186)	$ (21,828)
Net loss per common share basic and diluted	$ (1.70)	$ (2.72)	$ (1.54)
Weighted-average common shares used to compute basic and diluted net loss per share	14,450,715	14,390,641	14,156,848
Service [Member]
Operating revenues
Total operating revenues	$ 4,796	$ 3,618	$ 2,625

Consolidated Statement of Stockholders’ Equity - USD ($)
$ in Thousands

Common Stock [Member]

Additional Paid-in Capital [Member]

Accumulated Deficit [Member]

Total

Balance at Mar. 31, 2015

$ 1

$ 255,863

$ (41,657)

$ 214,207

Balance, Shares at Mar. 31, 2015

12,614,297

Issuance of stock, net of closing costs

64,792

Issuance of stock, net of closing costs, Shares

1,725,000

Equity based compensation

^[1]

4,970

Equity based compensation, Shares

^[1]

41,991

Stock option exercises

Stock option exercises, Shares

3,306

Net loss

(21,828)

Balance at Mar. 31, 2016

$ 1

325,670

(63,485)

262,186

Balance, Shares at Mar. 31, 2016

14,384,594

Equity based compensation

^[1]

4,744

Equity based compensation, Shares

^[1]

49,774

Stock option exercises

152

Stock option exercises, Shares

8,000

Net loss

(39,186)

Balance at Mar. 31, 2017

$ 1

330,566

(102,671)

227,896

Balance, Shares at Mar. 31, 2017

14,442,368

Equity based compensation

^[1]

4,934

Equity based compensation, Shares

^[1]

31,542

Stock option exercises

267

Stock option exercises, Shares

13,740

Net loss

(24,568)

Balance at Mar. 31, 2018

$ 1

$ 335,767

$ (127,239)

$ 208,529

Balance, Shares at Mar. 31, 2018

14,487,650

[1]	includes restricted shares issued.

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (24,568)	$ (39,186)	$ (21,828)
Adjustments to reconcile net loss to net cash used by operating activities
Depreciation and amortization	2,845	2,232	556
Non-cash compensation expense attributable to stock awards	5,602	4,744	4,970
Deferred income taxes	(6,498)	6,498
Bad debt expense	22	58
Accretion expense	14	12
Loss on disposal of assets	86	29
Changes in operating assets and liabilities
Accounts receivable	(320)	(166)	(133)
Inventory	(45)	(35)	(93)
Prepaid expenses and other assets	(91)	(276)	(312)
Accounts payable and accrued expenses	923	(239)	(2,620)
Accounts payable - officers	58	(8)	3
Accrued interest expense			(3)
Deferred revenue	(752)	(786)	(722)
Other liabilities	738	619	388
Net cash (used) provided by operating activities	(21,986)	(26,504)	(19,794)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of intangible assets	(1,931)	(750)	(2,068)
Purchases of equipment	(950)	(1,640)	(9,077)
Payments for patent costs		(1)	(12)
Net cash used by investing activities	(2,881)	(2,391)	(11,157)
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from follow-on offering			64,792
Payment of notes payable	(497)	(495)	(297)
Proceeds from stock option exercise	267	153	45
Taxes withheld and paid on employee stock awards	(668)	(143)
Net cash (used by) provided from financing activities	(898)	(485)	64,540
Net change in cash and cash equivalents	(25,765)	(29,380)	33,589
CASH AND CASH EQUIVALENTS
Beginning of the period	124,083	153,463	119,874
End of the period	$ 98,318	$ 124,083	$ 153,463

Nature of Operations

12 Months Ended

Mar. 31, 2018

Nature of Operations [Abstract]

Nature of Operations

pdvWireless, Inc. (the “Company”) is a private wireless communications company focused on developing and offering its spectrum assets for the deployment of next generation network and mobile communication solutions designed to meet the needs of critical infrastructure and enterprise customers. The Company is the largest holder of licensed spectrum in the Part 90 900 MHz band (i.e., 896-901 MHz paired with 935-940 MHz) throughout the contiguous United States, plus Hawaii, Alaska and Puerto Rico.

The Company’s first priority involves pursuing regulatory initiatives at the Federal Communications Commission (“FCC”) with the goal of modernizing and realigning the 900 MHz band to increase its usability and capacity, including for the future potential deployment of broadband and other advanced technologies and services. At the same time, the Company is exploring and developing network and mobile communication solutions, leveraging its spectrum to address the unmet needs of its targeted critical infrastructure and enterprise customers. For its first offering, the Company has deployed push-to-talk (“PTT”) networks and offers its Team ConnectSM, which we initially branded and marketed as DispatchPlusTM, two-way radio service to businesses in seven major metropolitan market areas throughout the United States, including Atlanta, Baltimore/Washington, Chicago, Dallas, Houston, New York and Philadelphia. TeamConnect allows enterprise customers to increase the productivity of their field-based workers and the efficiency of their dispatch and call center operations. The Company is pursuing opportunities to enable additional network and mobile communication solutions for use by critical infrastructure and enterprise customers with its existing spectrum and currently available non-broadband technologies and, if the Company is successful with its FCC efforts, utilizing its spectrum assets to enable broadband and other advanced wireless service offerings.

The Company was originally incorporated in California in 1997 and reincorporated in Delaware in 2014. In November 2015, the Company changed its name from Pacific DataVision, Inc. to pdvWireless, Inc. The Company maintains offices in Woodland Park, New Jersey, Reston, Virginia and San Diego, California. It also maintains a sales office in West Conshohocken, Pennsylvania.

TeamConnect and pdvConnect Businesses

During the year ended March 31, 2016, the Company began offering its TeamConnect service in seven major metropolitan areas throughout the United States. The Company developed TeamConnect to address the needs of enterprises that value a tailored PTT solution addressing the management of their mobile workforce. The operation of the Company’s TeamConnect business is separate from, and not contingent on, the initiatives it is pursuing at the FCC or its other spectrum-related activities.

The Company’s revenues are derived substantially from its TeamConnect and pdvConnectTM offerings. The TeamConnect service combines pdvConnect, a proprietary suite of mobile communication and workforce management applications, with advanced digital network architecture and mobile devices supplied by Motorola Solutions, Inc. and/or its subsidiaries (“Motorola”). Developed for dispatch-centric businesses, and historically offered to customers who utilize Tier 1 cellular networks, pdvConnect is an efficient mobile communication and workforce management solution that enables businesses to locate and communicate with their field workers and improve the documentation of work events and job status. Also built with the commercial dispatch customer in mind, Motorola’s digital network architecture allows the Company to provide reliable, instant and wide-area PTT communication services to its customers.

To date, sales of the Company’s TeamConnect service have been slower to ramp-up than initial expectations. The Company primarily markets its TeamConnect service to customers indirectly through third-party dealers selected from Motorola’s nationwide dealer network and other select wireless dealers. The Company has historically supported its indirect sales representatives by providing them with training, marketing and advertising support from its internal sales and marketing team. The Company typically enters into contracts directly with end users of its TeamConnect communication solutions, including those introduced to it through its indirect dealer network.

Spectrum Initiatives

The Company’s spectrum is its most valuable asset. Although the Company can use its spectrum for its existing TeamConnect business and for other narrowband and wideband wireless services, many of the future business opportunities that the Company has identified require higher bandwidth than allowed by the current configuration of its spectrum. As a result, the Company is pursuing a number of initiatives to increase the usability and capacity of its spectrum.

In November 2014, the Company and the Enterprise Wireless Alliance (“EWA”) submitted a Joint Petition for Rulemaking to the FCC to propose the realignment of a portion of the 900 MHz band from narrowband to broadband. In response to the Joint Petition, the FCC issued a public notice requesting comments from interested parties and asked a number of questions about the proposal. A number of parties, including several incumbent licensees, filed comments with the FCC expressing their views, including both support and opposition. In May 2015, the Company and the EWA filed proposed rules with the FCC related to the Joint Petition. Comments on the proposed rules were filed in June 2015, and reply comments in July 2015.

On August 4, 2017, the FCC issued a Notice of Inquiry (“NOI”) that the Company believes signified the FCC’s interest in conducting a serious and comprehensive evaluation of the current and future rules governing the 900 MHz band. In the NOI, the FCC announced that it had commenced a proceeding to examine whether it would be in the public interest to change the existing rules governing the 900 MHz band to enable increased access to spectrum, improved spectrum efficiency and expanded flexibility for a variety of potential uses and applications, including broadband and other advanced technologies and services. The FCC stated that the purpose of the NOI was to gather information from interested parties to assist the FCC in its decision-making process. The FCC requested interested parties, including the Company, to comment on a number of questions related to three potential options for the 900 MHz band: (i) retaining the current configuration of the 900 MHz band, but increasing operational flexibility, (ii) reconfiguring a portion or all of the 900 MHz band to support broadband and other advanced technologies and services or (iii) retaining the current 900 MHz band licensing and eligibility rules. Because the FCC requested information on multiple options for the 900 MHz band, the NOI effectively supersedes the Joint Petition and other pending proposals that involved the 900 MHz band. However, a broadband reconfiguration option included in the NOI was consistent with the Company’s Joint Petition proposal, and all information the Company previously provided to the FCC to support the realignment and modernization of the 900 MHz band remained relevant.

The Company and EWA filed a joint response to the FCC’s NOI on October 2, 2017 and reply comments on November 1, 2017. On May 1, 2018, the Company and the EWA augmented elements of their initial joint response to the NOI based on the Company’s discussions and interactions with incumbents and other interested parties to the NOI proceeding. This filing was intended to address and resolve issues and concerns expressed by incumbents in and adjacent to the portion of the 900 MHz band proposed for broadband use. The Company’s most recent responsive filing also proposed a means to increase the alternatives through which licenses for a new 3 X 3 900 MHz broadband service could be put to use by utilities and other members of the critical infrastructure industry, as well as by other private enterprise companies. The Company believes these alternatives add elements of flexibility and, ideally, could shorten the time required to introduce important broadband communication capabilities to these market segments.

Specifically, the Company’s most recent responsive filing proposes that: (i) during the first year after FCC adoption of the relevant licensing rules, utilities and other Business/Industrial/Land Transportation (“B/ILT”) applicants would have the exclusive opportunity to secure Private Enterprise Broadband (“PEBB”) licenses, and could utilize the traditional frequency coordination process to do so, based on acquiring control of the requisite 240 discrete 900 MHz channels (the number of channels equivalent to a 3 X 3 MHz broadband allocation) through combining any of their own licensed channels with any they might purchase or lease from third party licensees and those they might be assigned from the FCC’s available channel inventory; (ii) successful applicants then could obtain frequency coordinator approval to exchange such channels for a 3 X 3 MHz PEBB license to be issued by the FCC, which could be deployed, operated and maintained, in accordance with applicable service rules, either solely by the applicant licensee, or with the assistance and/or participation of third parties and (iii) the coverage territory for such a PEBB license would correspond (a) in urbanized areas (defined to be the top 306 Cellular Market Areas; “CMAs”), to a metropolitan statistical area (“MSA”) and (b) in non-urbanized areas (the remaining CMAs) to individual counties, which the Company believes, in each case, represent geographic areas that will more closely match up with the service territories of most utilities and the areas of business focus for other private enterprises. In addition, the Company’s most recent responsive filing proposes shifting the contemplated 3 X 3 MHz broadband allocation 400 kHz down to a new location in the 900 MHz band, a change that has addressed the concern regarding potential interference previously expressed by incumbents in the narrowband PCS spectrum immediately above the top end of the Company’s portion of the 900 MHz band. It also will allow for greater separation between any co-located frequencies in narrowband systems.

The Company and the EWA have responded to all outstanding requests for information from the FCC, and are currently awaiting FCC action. Based on its discussions with the staff of the FCC, the Company believes that the proceeding is under active consideration. The FCC’s next step could be issuance of a Notice of Proposed Rulemaking based on the NOI and the record developed in response to it, a request for additional information, a decision to close the proceeding without further action, or some other action, and the timing of any such next step also remains uncertain. Moreover, certain of the matters proposed in the Company’s most recent further responsive filing are contingent on other developments, such as formalizing our tentative agreement with the Association of American Railroads to exchange their frequencies, some of which are located immediately below the lower end of the originally proposed 900 MHz broadband allocation, for the Company’s frequencies further down in the 900 MHz band, to accommodate the proposed 400 kHz shift of that allocation. In addition, all aspects of potential changes in the configuration and/or use of frequencies in the 900 MHz band remain subject to necessary FCC approvals.

The Company continues to believe in the merits of its broadband approach, and that it would be in the public interest for the FCC to realign the 900 MHz band to enable broadband and other advanced technologies and services. Nevertheless, obtaining a favorable result from the FCC may take a significant amount of time and resources. Moreover, there is no assurance that following the conclusion of the NOI process, the FCC will ultimately propose and adopt rules that will allow utilization of the Company’s licensed 900 MHz spectrum to offer broadband and other advanced technologies and services.

The full text of the NOI, further comments and related correspondences are available on the FCC’s public website at https://www.fcc.gov/document/900-mhz-notice-inquiry, and the Company’s filed comments and responses, as well as those of others submitting comments and/or responses in the NOI proceeding, also are available on the FCC’s public website.

To prepare for the filings its has submitted with the FCC and to build support for a 900 MHz broadband realignment, the Company has met, and intends to continue to meet, with a number of incumbent licensees, critical infrastructure businesses and other interested parties in the 900 MHz band. The Company has provided business proposals to several incumbents to assist with their communication needs. The goals of these discussions have been: (i) building consensus for the proposed reconfiguration of the 900 MHz band to support broadband and other advanced technologies and services; (ii) resolving any technology or other concerns raised by incumbent licensees; (iii) educating critical infrastructure businesses on how broadband capabilities could enhance their operations and initiatives (for example, supporting grid modernization requirements or monitoring and/or controlling their own system or network elements via machine-to-machine type services); (iv) gaining a better understanding of the size of the operational incumbent base and the nature of the systems they are currently operating; (v) to refine and modify aspects of the Company’s proposal to seek to minimize potential concerns and problems expressed by certain incumbents; (vi) to gain additional support for the Company’s proposal (as so refined and modified); (vii) to accelerate the availability of a sub-1 GHz broadband spectrum allocation for use in a private network context designed to meet the specialized requirements of utilities, other critical infrastructure industry members and private enterprise users; and (viii) evaluating and proposing voluntary license relocation opportunities to certain incumbent licensees. With certain incumbent licensees, the Company is continuing to attempt to build consensus and to resolve any concerns they have expressed regarding its broadband initiatives; with others, the Company is soliciting their support and cooperation to structure and implement mutually beneficial relocations; and with select critical infrastructure enterprises, the Company is jointly investigating how the future broadband capabilities it is pursuing could be employed to meet their anticipated needs and future operating plans. A number of critical infrastructure and enterprise companies have put on the record their needs and unique requirements for networks and services utilizing broadband and other next generation technologies. The Company anticipates that the NOI proceeding will continue to afford these companies and other similarly situated companies with the opportunity to put on the record their needs and unique requirements for broadband and other next generation technologies.

Restatement of Previously Issued Consolidated Financial Statements

12 Months Ended

Mar. 31, 2018

Restatement of Previously Issued Consolidated Financial Statements [Abstract]

Restatement of Previously Issued Consolidated Financial Statements

2. Restatement of Previously Issued Consolidated Financial Statements

In connection with preparing its financial statements for the quarter ended June 30, 2018, the Company determined that it incorrectly interpreted the effective dates of changes in the accounting treatment of its net operating losses (“NOLs”) according to the new tax provisions instituted by the Tax Cuts and Jobs Act of 2017, which was signed into law on December 22, 2017 (the “TCJA”). The TCJA, among other items: (i) increased the NOL carryforward period from 20-years to an indefinite carryforward period and (ii) limited the percentage of NOLs that may be used to offset taxable income to 80%.

Under the TCJA, the 80% limitation applies to NOLs arising in taxable years “beginning after” December 31, 2017, which for the Company would be its fiscal year commencing on April 1, 2018 and ending on March 31, 2019 (“Fiscal 2019”). The TCJA, however, provides that the indefinite carryforward period applies to NOLs arising in taxable years “ending after” December 31, 2017, which for the Company would be its fiscal year beginning on April 1, 2017 and ending on March 31, 2018 (“Fiscal 2018”). Based on these dates, NOLs generated by the Company during Fiscal 2018 would both (i) not be subject to the 80% limitation and (ii) have an indefinite life.

In preparing its financial statements for the quarter ended December 31, 2017 and the year ended March 31, 2018 (the “Relevant Periods”), the Company, in consultation with its third-party tax firm, determined that it was unlikely that Congress intended to provide this double benefit to the NOLs generated by the Company during Fiscal 2018. As a result, the Company determined that an appropriate approach would be to continue to limit the carryforward period during Fiscal 2018 to 20 years, rather than apply an indefinite life to these NOLs.

Based on its review of available accounting literature in connection with preparing its financial statements for the quarter ended June 30, 2018, the Company determined that it should apply the accounting changes implemented by the TCJA in accordance with the effective dates set forth in the TCJA. Specifically, the Company determined that, based on the current language of the TCJA, the correct accounting treatment for the NOLs it generated during Fiscal 2018 is to apply an indefinite life to these NOLs.

Applying an indefinite life to the NOLs the Company generated during Fiscal 2018 enables the Company to utilize an increased amount of NOLs to offset the deferred tax liability created by the Company’s amortization of its indefinite-lived intangibles. The Company determined that it should recognize an additional deferred tax benefit of $5.6 million for the three months ended December 31, 2017 and $6.0 million for the fiscal year ended March 31, 2018.

Although these changes are non-cash items and do not change the Company’s reported operating revenues or reported operating costs and expenses, the Company determined that these changes have a material impact on the as filed financial statements for the Relevant Periods. As a result, on August 9, 2018, the Company filed an amended Quarterly Report on Form 10-Q/A for the quarter ended December 31, 2017 and this amended Annual Report on Form 10-K/A for the year ended March 31, 2018, with amended and restated financial statements and financial information for these periods.

The table below sets forth the consolidated balance sheet, including the balances originally reported, the adjustments and the as restated balances for the fiscal year ended March 31, 2018 (in thousands):


	As of March 31, 2018
	As
	Originally
	Reported		Adjustments		As Restated
Liabilities
Deferred income tax liability	$	6,060	$	(6,060)	$	—
Total liabilities		17,871		(6,060)		11,811

Stockholders' Equity
Accumulated deficit	$	(133,299)	$	6,060	$	(127,239)
Total stockholders' equity		202,469		6,060		208,529

The table below sets forth the consolidated statements of operations, including the balance originally reported, the adjustment and the as restated balance for the fiscal year ended March 31, 2018 (in thousands, except per share data):


	Year ended March 31, 2018
	As
	Originally
	Reported		Adjustments		As Restated
Income tax benefit	$	(438)	$	(6,060)	$	(6,498)
Net loss		(30,628)		6,060		(24,568)
Net loss per common share basic and diluted	$	(2.12)	$	0.42	$	(1.70)

The table below sets forth the consolidated statement of stockholders’ equity, including the balances originally reported, the adjustments and the as restated balances for the fiscal year ended March 31, 2018 (in thousands):


			Total
	Accumulated		Stockholders'
	Deficit		Equity
Balance at March 31, 2018, As Reported	$	(133,299)	$	202,469
Adjustments		6,060		6,060
Balance at March 31, 2018, As Restated	$	(127,239)	$	208,529

The table below sets forth the consolidated statements of cash flows from operating activities, including the balances originally reported, the adjustments and the as restated balances for the year ended March 31, 2018 (in thousands):


	Year ended March 31, 2018
	As
	Originally
	Reported		Adjustments		As Restated
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$	(30,628)	$	6,060	$	(24,568)
Adjustments to reconcile net loss to net cash used by operating activities
Deferred Income Tax		(438)		(6,060)		(6,498)
Net cash flows used by operating activities	$	(21,986)		—	$	(21,986)

The restatement had no impact on cash flows from investing activities or financing activities for the reported period.

In addition to the restated Consolidated Financial Statements, the information contained in Note 10 – Income Taxes has been amended and restated.

Summary of Significant Accounting Policies

12 Months Ended

Mar. 31, 2018

Summary of Significant Accounting Policies [Abstract]

Summary of Significant Accounting Policies

3. Summary of Significant Accounting Policies

Basis of Presentation and Use of Estimates

The consolidated financial statements and accompanying notes are prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”), which require management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The most significant estimates relate to allowance for doubtful accounts, estimated useful lives of depreciable assets, asset retirement obligations, the carrying amount of long-lived assets under construction in process, valuation allowance on the Company’s deferred tax assets, and recoverability of intangible assets. The Company is also required to make certain estimates with regard to the valuation of awards and forfeiture rates for its share-based award programs. Estimates and assumptions are reviewed periodically and the effects of revisions are reflected in the financial statements in the applicable period. Accordingly, actual results could materially differ from those estimates.

The accompanying consolidated financial statements include the accounts of the Company and its subsidiaries, including PDV Spectrum Holding Company, LLC formed in April 2014. All significant intercompany accounts and transactions have been eliminated in consolidation.

Reclassifications

Certain prior year amounts have been reclassified to conform to the presentation of the corresponding amounts in the financial statements for the year ended March 31, 2018. These reclassifications had no effect on previously reported results of operations, cash flows, assets, liabilities or equity for the years presented.

Cash and Cash Equivalents

All highly liquid investments with maturities of three months or less at the time of purchase are considered cash equivalents. Cash equivalents are stated at cost, which approximates the quoted market value and include amounts held in money market funds.

Allowance for Doubtful Accounts

An allowance for uncollectible receivables is estimated based on a combination of write-off history, aging analysis and any specific known troubled accounts. The Company reviews its allowance for uncollectible receivables on a quarterly basis. Past due balances meeting specific criteria are reviewed individually for collectability. At March 31, 2018 and March 31, 2017, management provided an allowance of approximately $29,000 and $53,000, respectively, for certain slow paying accounts.

Inventory

Inventories, which consist of vehicle-mounted devices, handsets, and accessories are valued at the lower of cost or net realizable value, with net realizable value being defined as replacement value using the First In, First Out method. Provisions are made periodically to reduce any excess, obsolete or slow moving inventory to its net realizable value.

Property and Equipment

Property and equipment is stated at cost. Depreciation is computed using the straight-line method over the shorter of the estimated useful lives of the assets or the applicable lease term. The carrying amount at the balance sheet date of long-lived assets under construction in process include construction costs to date on capital projects that have not been completed, assets being constructed that are not ready to be placed into service, and assets that are not currently in service. On a periodic basis costs within construction in process are reviewed and a determination is made if the assets being developed will be put into use. If it is concluded that the asset will not be put into use, the costs will be expensed. If the asset will be put into use, the costs are transferred to property and equipment when substantially all of the activities necessary to prepare the assets for their intended use are completed. Depreciation commences upon completion.

Accounting for Asset Retirement Obligations

An asset retirement obligation is evaluated and recorded as appropriate on assets for which the Company has a legal obligation to retire. The Company records a liability for an asset retirement obligation and the associated asset retirement cost at the time the underlying asset is acquired and put into service. Subsequent to the initial measurement of the asset retirement obligation, the obligation is adjusted at the end of each period to reflect the passage of time and changes in the estimated future cash flows underlying the obligation, if any. Over time, the liability is accreted to its present value and the capitalized cost is depreciated over the estimated useful life of the asset.

The Company enters into long-term leasing arrangements primarily for tower site locations. The Company constructs assets at these locations and, in accordance with the terms of many of these agreements, the Company is obligated to restore the premises to their original condition at the conclusion of the agreements, generally at the demand of the other party to these agreements. The Company recognizes the fair value of a liability for an asset retirement obligation and capitalizes that cost as part of the cost basis of the related asset, depreciating it over the useful life of the related asset. Upon settlement of the obligation, any difference between the cost to retire the asset and the recorded liability is recognized in the Consolidated Statement of Operations.

As of March 31, 2018, the Company had an asset retirement obligation of approximately $0.3 million.

Changes in the liability for the asset retirement obligations for the years ended March 31, 2018 and 2017 are summarized below (in thousands):


	2018		2017
Balance at beginning of the year	$	268	$	204
Additional liabilities accrued		34		52
Accretion expense		14		12
Balance at end of the year	$	316	$	268

Intangible Assets

Intangible assets are wireless licenses that will be used to provide the Company with the exclusive right to utilize designated radio frequency spectrum to provide wireless communication services. While licenses are issued for only a fixed time, generally ten years, such licenses are subject to renewal by the FCC. License renewals have occurred routinely and at nominal cost in the past. There are currently no legal, regulatory, contractual, competitive, economic or other factors that limit the useful life of the Company’s wireless licenses. As a result, the Company has determined that the wireless licenses should be treated as an indefinite-lived intangible asset. The Company will evaluate the useful life determination for its wireless licenses each year to determine whether events and circumstances continue to support their treatment as an indefinite useful life asset.

The licenses are tested for impairment on an aggregate basis, as the Company will be utilizing the wireless licenses on an integrated basis as a part of developing its nationwide network. Before employing detailed impairment testing, the Company first evaluates the likelihood of impairment by considering relevant qualitative factors that may have a significant bearing on fair value. If it determines that it is more likely than not that the wireless licenses are impaired, it will apply a quantitative analysis including detailed testing methodologies. Otherwise, it concludes that no impairment exists. In the event a quantitative analysis is required, the Company considers estimates of valuation methods to perform the test of the fair values of the wireless licenses using, among other things, market based and discounted cash flow approaches.

Patent Costs

Costs to acquire a patent on certain aspects of the Company’s technology have been capitalized. These amounts are amortized, subject to periodic evaluation for impairment, over statutory lives following award of the patent. Gross patent costs are approximately $572,000 at March 31, 2018 and March 31, 2017 and the associated accumulated amortization amounted to approximately $375,000 and $362,000, respectively. Amortization expense was approximately $13,000, $13,000, and $11,000 for the years ended March 31, 2018, 2017 and 2016, respectively. The amortization expense is estimated to aggregate $13,000 per year over the next five year period. Renewal costs are expensed when incurred.

Long-Lived Asset Impairment

The Company evaluates long-lived assets, other than intangible assets with indefinite lives, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset group may not be recoverable. Asset groups are determined at the lowest level for which identifiable cash flows are largely independent of cash flows of other groups of assets and liabilities. When the carrying amount of a long-lived asset group is not recoverable and exceeds its fair value, an impairment loss is recognized equal to the excess of the asset group’s carrying value over the estimated fair value.

Fair Value of Financial Instruments

Financial instruments, including cash and cash equivalents, accounts receivable, accounts payable, and accrued expenses are carried at cost, which management believes approximates fair value because of the short term maturity of these instruments.

Revenue Recognition

The Company recognizes revenue in the period that persuasive evidence of an arrangement exists, delivery of the product has occurred or services have been rendered, it is able to determine the amount of revenue and when the collection of such amount is considered probable. In accordance with the guidance provided in Accounting Standards Codification (“ASC”) Topic 605-45-45, (Revenue Recognition – Principal Agent Considerations), the Company has determined that it is the primary obligor with respect to the service revenue derived from sales of the Company’s software applications through its Tier I domestic carrier partners. As a result, revenue is recorded at the gross amount billed to end-user customers for sales through these carrier partners. The Company also sells service and applications directly to end-users, which are billed and collected directly by the Company.

In September 2014, Motorola paid the Company an upfront, fully-paid leasing fee of $7.5 million in order to lease a portion of the Company’s wireless spectrum licenses. The payment of the fee is accounted for as deferred revenue on the Company’s Consolidated Balance Sheets. The Company recognizes leasing revenue in accordance with ASC Topic 840, (Leases). The fee is amortized using the straight-line method over the lease term of approximately ten years, which represents the time period in which the benefits of the leased property are expected to be depleted.

The Company evaluates certain transactions for its TeamConnect service offering to determine whether they should be viewed as a Multiple Element Arrangement provided in ASC Topic 605-25. Judgment is required to properly identify the accounting units of the multiple deliverable transactions and to determine the manner in which revenue should be allocated among the units of accounting. Multiple deliverable arrangements are presumed to be bundled transactions, and the total consideration is measured and allocated to the separate transactions based on their relative selling price with certain limitations. The relative selling price for each deliverable is determined using vendor-specific objective evidence (“VSOE”) of selling price or third-party evidence of selling price if VSOE does not exist. If neither VSOE nor third party evidence of selling price exist, the Company uses its best estimate of the selling price for the deliverable. The Company has determined that the rental of user devices in connection with service contracts for its TeamConnect service are multiple deliverable arrangements.

Cost of Revenue

The Company’s cost of revenue relating to sales of its software applications through its wireless carrier partners includes the portion of service revenue retained by its domestic Tier 1 carrier partners pursuant to its agreements with these parties, which may include network services, connectivity, SMS service, sales, marketing, billing and other ancillary services. With respect to its TeamConnect service offering, the Company’s cost of revenue includes the costs of operating its dispatch network and its cloud-based solutions and to a lesser degree, the costs associated with the sales of the relevant user devices.

Shipping and Handling Costs

Costs associated to shipping and handling of two-way radios and accessories to dealers or end-user customers are recognized as incurred and included in cost of revenue in the Consolidated Statements of Operations.

Indirect Sales Commissions

Cash consideration given to a dealer is presumed to be a reduction of revenue unless the Company receives, or will receive, an identifiable benefit in exchange for the consideration, and the fair value of such benefit can be reasonably estimated, in which case the consideration will be recorded as a selling expense. The Company compensates its indirect sales representatives with an upfront commission and residual fees based on a customer’s continued use of its TeamConnect service. When a commission is earned solely due to the selling activity relating to the Company’s TeamConnect service, the cost is recorded as a selling expense. The Company reviews and records the estimated incentives payable to the indirect sales representatives as accrued expense on a monthly basis.

Product Development Costs

The Company charges all product and development costs to expense as incurred. Types of expense incurred in product and development costs include employee compensation, consulting, travel, facility costs and equipment and technology costs.

Advertising and Promotional Expense

The Company expenses advertising and promotional costs as incurred. Cooperative advertising reimbursements from vendors are recorded net of advertising and promotional expense in the period in which the related advertising and promotional expense is incurred. Advertising and promotional expense was approximately $155,000 for the year ended March 31, 2018, approximately $103,000 for the year ended March 31, 2017, and approximately $161,000 for the year ended March 31, 2016.

Stock Compensation

The Company accounts for stock options in accordance with US GAAP, which requires the measurement and recognition of compensation expense, based on the estimated fair value of awards granted to consultants, employees and directors. The Company estimates the fair value of share-based awards on the date of grant using an option-pricing model. The value of the portion of the award that is ultimately expected to vest is recognized as expense in the Company’s statements of operations over the requisite service periods. In the event the participant’s employment by or engagement with (as a director or otherwise) the Company terminates before exercise of the options granted, the stock options granted to the participant shall immediately expire and all rights to purchase shares thereunder shall immediately cease and expire and be of no further force or effect, other than applicable exercise rights for vested shares that may extend past the termination date as provided for in the participant’s applicable option award agreement. Additionally, the Compensation Committee adopted an Executive Severance Plan (the “Severance Plan”) in February 2015, and the Company subsequently entered into Severance Plan Participation Agreements with its executive officers and certain key employees. In addition to providing participants with severance payments, the Severance Plan provides for accelerated vesting and extends the exercise period for outstanding equity awards if the Company terminates a participant’s service for reasons other than cause, death or disability or the participant terminates his or her service for good reason, whether before or after a change of control (each of such terms as defined in the Severance Plan).

To calculate option-based compensation, the Company uses the Black-Scholes option-pricing model. The Company’s determination of fair value of option-based awards on the date of grant using the Black-Scholes model is affected by assumptions regarding a number of subjective variables.

The fair value of restricted stock, restricted stock units and performance units are measured based upon the quoted closing market price for the stock on the date of grant. The compensation cost for the restricted stock and restricted stock units is recognized on a straight-line basis over the vesting period. The compensation cost for the performance units is recognized when the performance criteria are expected to be complete.

No tax benefits have been attributed to the share-based compensation expense because the Company maintains a full valuation allowance for all net deferred tax assets.

Effective April 1, 2017, the Company adopted ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”), which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. Under the new guidance, all excess tax benefits and tax deficiencies, including tax benefits of dividends on share-based payment awards, should be recognized as income tax expense or benefit in the income statement, eliminating the notion of the additional paid-in capital (“APIC”) pool. The excess tax benefits will be classified as operating activities along with other income tax cash flows rather than financing activities in the statement of cash flows. The tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. ASU 2016-09 also allows entities to elect to either estimate the total number of awards that are expected to vest or account for forfeitures when they occur. Additionally, ASU 2016-09 clarifies that cash payments to tax authorities in connection with shares withheld to meet statutory tax withholding requirements should be presented as a financing activity in the statement of cash flows. The Company has elected to continue its past practice of estimating the total number of awards expected to vest and adopted the provisions of ASU 2016-09 related to changes in the consolidated statements of cash flows on a retrospective basis.

Income Taxes

The Company utilizes the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the carrying amounts and the tax bases of assets and liabilities as well as from net operating loss and tax credit carryforwards. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period that includes the enactment date. A valuation allowance is established when it is estimated that it is more likely than not that the tax benefit of a deferred tax asset will not be realized.

Accounting for Uncertainty in Income Taxes

The Company recognizes the effect of tax positions only when they are more likely than not to be sustained. Management has determined that the Company had no uncertain tax positions that would require financial statement recognition or disclosure. The Company is no longer subject to U.S. federal, state or local income tax examinations for periods prior to 2014.

Net Loss Per Share of Common Stock

Basic net loss per common share is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration for potentially dilutive securities. For purposes of the diluted net loss per share calculation, preferred stock, convertible notes payable-affiliated entities, stock options, restricted stock and warrants are considered to be potentially dilutive securities. Because the Company has reported a net loss for the years ended March 31, 2018, 2017 and 2016, diluted net loss per common share is the same as basic net loss per common share for those periods.

Common stock equivalents resulting from potentially dilutive securities approximated 1,002,000, 709,000 and 900,000 at March 31, 2018, 2017 and 2016, respectively, and have not been included in the dilutive weighted average shares of common stock outstanding, as their effects are anti-dilutive.

Recently Issued Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers. This standard, along with its related amendments, requires companies to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which they expect to be entitled in exchange for those goods or services. This new standard will be adopted by the Company for annual and interim reporting periods beginning with the first quarter of fiscal year 2019.

The FASB allows two adoption methods under ASC 606. Companies are permitted to either apply the requirements retrospectively to all prior periods presented, or apply the requirements in the year of adoption, through a cumulative adjustment. The Company currently plans to adopt the standard in the first quarter of fiscal year 2019, using the “modified retrospective method.” Under that method, the Company will apply the rules to all contracts existing as of April 1, 2018, recognizing, in beginning retained earnings, a cumulative-effect adjustment to include the establishment of contract asset and contract liability accounts with a corresponding adjustment to retained earnings. The Company will also provide additional disclosures comparing revenue recognized under ASC 606 to revenue as reported prior to the adoption of the standard.

During the first quarter of Fiscal 2019, the Company will record a cumulative adjustment to accumulated deficit that is primarily composed of the following:

a net contract asset related to the portion of the Company’s revenues associated with service plans that are sold concurrently with a subsidized handset; and

an asset related to costs incurred to acquire a contract, which primarily relates to the deferral of commission expenses.

The timing of expense recognition related to certain of the Company’s contract acquisition costs, primarily sales commissions, will be impacted as these expenses will be capitalized and amortized under the new standard rather than being expensed as incurred under existing authoritative guidance. The Company expensed approximately $0.7 million of contract acquisition costs during the year ended March 31, 2018.

While the Company has reached conclusions on the key accounting assessments related to adopting this standard, it is continuing to finalize its assessment of the resulting quantitative impacts. Based on currently available information, the Company estimates that its opening accumulated deficit balance on April 1, 2018 will decrease by between $0.7 million and $0.9 million, primarily related to the deferral of previously expensed contract acquisition costs. The Company does not expect to recognize a material net contract asset.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Recognition and Measurement of Financial Instruments and Financial Liabilities. This update requires that equity investments (except those accounted for under the equity method of accounting or those that result in consolidation) be measured at fair value with changes in fair value recognized in net income. The amendments in this update also simplify the impairment assessment of equity investments without readily determinable fair values. This update is effective for the fiscal year beginning April 1, 2018. The adoption of this guidance is not expected to have an effect on the Company’s consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases. The ASU amends a number of aspects of lease accounting, including requiring lessees to recognize operating leases with a term greater than one year on their balance sheet as a right-of-use asset and corresponding lease liability, measured at the present value of the lease payments. The ASU also requires disclosure of key information about leasing arrangements to increase the transparency and comparability among organizations. The accounting for lessors does not fundamentally change except for changes to conform and align guidance to the lessee guidance as well as to the new revenue recognition guidance in ASU 2014-09. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. ASU 2016-02 requires reporting organizations to take a modified retrospective transition approach (as opposed to a full retrospective transition approach). The Company decided not to early adopt the ASU. The Company is evaluating the potential impact that ASU 2016-02 will have on its consolidated financial statements.

In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 addresses how certain cash receipts and cash payments are presented and classified in the statement of cash flows under Topic 230, Statement of Cash Flows, and Other Topics. ASU 2016-15 is effective for annual reporting periods, and interim periods therein, beginning after December 15, 2017. The adoption of this guidance is not expected to have an effect on the Company’s consolidated financial statements.

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other: Simplifying the Test for Goodwill Impairment. ASU 2017-04 eliminated Step 2 from the goodwill impairment test which required entities to compute the implied fair value of goodwill by determining the fair value of the reporting unit's assets and liabilities as if they were assets acquired and liabilities assumed in a business combination. Instead of Step 2, entities performing their annual impairment test will recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value. Entities will continue to have the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The adoption of this guidance is not expected to have an effect on the Company’s consolidated financial statements.

In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Topic 718) Scope of Modification Accounting. The amendments in ASU 2017-09 provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. The adoption of ASU 2017-09 will become effective for annual periods beginning after December 15, 2017 with prospective application. Although the Company is currently evaluating the potential impact Topic 718 may have on its financial position, it does not believe there will be a material impact on the consolidated financial statements.

Subsequent Events Evaluation by Management

Management has evaluated subsequent events for disclosure and/or recognition in the financial statements through the date of the Original Filing and has concluded that no subsequent events have occurred that would require recognition in the Financial Statements or disclosure in the Notes to the Financial Statements, other than those described in Note 17.

Inventory

12 Months Ended

Mar. 31, 2018

Inventory [Abstract]

Inventory

4. Inventory

Inventory consists of the following at March 31, 2018 and March 31, 2017 (in thousands):




	2018		2017
Mobile devices	$	88	$	39
Handsets		51		65
Accessories		34		24
Total inventory	$	173	$	128

Property and Equipment

12 Months Ended

Mar. 31, 2018

Property and Equipment [Abstract]

Property and Equipment

5. Property and Equipment

Property and equipment consists of the following at March 31, 2018 and March 31, 2017 (in thousands):



	Estimated
	useful life	2018		2017
Network sites and equipment	5-10 years	$	15,263	$	13,999
Computer equipment	5-7 years		184		944
Computer software	1-3 years		10		13
Furniture and fixture and other equipment	2-5 years		1,418		1,091
Leasehold improvements	Shorter of the lease term or 10 years		344		141
			17,219		16,188
Less accumulated depreciation			5,468		3,590
			11,751		12,598
Construction in process			1,024		1,911
Property and equipment, net		$	12,775	$	14,509

Depreciation expense for the years ended March 31, 2018, 2017 and 2016 amounted to approximately $2.8 million, $2.2 million and $0.5 million, respectively; approximately $2.6 million, $2.0 million and $0.4 million, respectively, of such depreciation expense was classified as cost of revenue while the remainder was classified as operating expenses in the Company’s Consolidated Statements of Operations. Leasehold improvements include certain allowances for tenant improvements related to the expansion of the Company’s corporate headquarters. Construction in process includes the expenditures related to the costs to establish the Company’s dedicated, wide-area, two-way radio dispatch networks in certain metropolitan areas. During the year ended March 31, 2018, $0.5 million costs in construction in process were expensed for assets that were not put into use.

Intangible Assets

12 Months Ended

Mar. 31, 2018

Intangible Assets [Abstract]

Intangible Assets

6. Intangible Assets

Wireless licenses are considered indefinite-lived intangible assets. Indefinite-lived intangible assets are not subject to amortization but instead are tested for impairment annually, or more frequently if an event indicates that the asset might be impaired. The Company believes that no impairment indicators existed as of March 31, 2018 for which the Company would recognize any impairment.

During the year ended March 31, 2018, the Company entered into agreements with several third parties in multiple U.S. markets to acquire wireless licenses for cash consideration, upon FCC approval. In addition, during the year ended March 31, 2017, the Company entered into a barter agreement whereby it will provide the use of the Company’s network, radios, and installation of equipment in exchange for wireless licenses.

Intangible assets consist of the following at March 31, 2018 and March 31, 2017 (in thousands):


	Wireless Licenses
Balance at March 31, 2016	$	103,655
Acquisitions		1,021
Balance at March 31, 2017	$	104,676
Acquisitions		1,931
Balance at March 31, 2018	$	106,606

Accounts Payable and Accrued Expenses

12 Months Ended

Mar. 31, 2018

Accounts Payable and Accrued Expenses [Abstract]

Accounts Payable and Accrued Expenses

7. Accounts Payable and Accrued Expenses

The table below provides additional information related to the Company’s accounts payable and accrued expenses at March 31, 2018 and March 31, 2017 (in thousands).



	2018		2017
Accounts payable and accrued expenses
Accounts payable	$	569	$	670
Accrued employee related expenses		2,337		2,385
Accrued expenses		630		222
Other		787		122
Total accounts payable and accrued expenses	$	4,322	$	3,399

Accounts Payable - Officers	12 Months Ended
Accounts Payable - Officers	Mar. 31, 2018
Accounts Payable - Officers [Abstract]
Accounts Payable - Officers	8. Accounts Payable - officers Accounts payable - officers represents unreimbursed expenses including travel and entertainment expense incurred by the Company’s officers. At March 31, 2018 and March 31, 2017, the accounts payable to officers amounted to approximately $94,000 and $36,000, respectively.

Note Payable	12 Months Ended
Note Payable	Mar. 31, 2018
Note Payable [Abstract]
Note Payable	9. Note Payable During the year ended March 31, 2016, the Company entered into a promissory note in the amount of $1,289,013 with a third party in exchange for wireless licenses. The term of the note was through March 15, 2018 and bore a fixed rate of interest of 0.55% per annum, which was based on the Short-Term Applicable Federal Rate on the closing date. For the years ended March 31, 2018 and 2017, the Company had repaid $497,265 and $494,545, respectively, in principal. There was no outstanding borrowings on the promissory note as of March 31, 2018. For the fiscal years 2018, 2017 and 2016, total interest expense on all notes payable was approximately $3,000, $5,000 and $3,000, respectively.

Income Taxes

12 Months Ended

Mar. 31, 2018

Income Taxes [Abstract]

Income Taxes

10. Income Taxes – As Amended and Restated

On December 22, 2017, President Trump signed the Tax Cuts and Jobs Act of 2017 (“TCJA”) into legislation. The TCJA includes numerous changes to existing tax law, including a permanent reduction in the federal corporate income tax rate from 35% to 21%. The rate reduction is effective as of January 1, 2018. Another provision included in the law is that operating losses incurred in years ending after December 31, 2017 may be carried forward indefinitely. The Company now can consider indefinite lived assets and the associated deferred tax liability as a source of future taxable income when assessing the potential to realize future tax deductions from indefinite carryforwards of net operating losses and interest expense.

The Company had federal and state net operating loss carryforwards of approximately $90.0 million at March 31, 2017, expiring in varying amounts from 2019 through 2037. For the year ended March 31, 2018, the Company incurred an operating loss of approximately $34.2 million which, per the provision in the TCJA does not expire and is not subject to the 80% of taxable income limitation upon usage.

The Company has deferred tax assets of approximately $30.9 million and $33.9 million relating principally to these net operating loss carryforwards at March 31, 2018 and 2017, respectively. Federal net operating loss carryforwards may be subject to limitations as a result of the change in ownership that occurred in the year ended March 31, 2015 as defined under Internal Revenue Code Section 382. State net operating loss carryforwards are subject to limitations which differ from federal law in that they may not allow the carryback of net operating losses, and have shorter carryforward periods.

Accounting Standards Codification Topic 740, Income Taxes, requires that a valuation allowance be recorded to reduce deferred tax assets when it is more likely than not that the tax benefit of the deferred tax assets will not be realized. The evaluation includes the consideration of all available evidence, both positive and negative, regarding historical operating results including recent years with reported losses, the estimated timing of future reversals of existing taxable temporary differences, estimated future taxable income exclusive of reversing temporary differences and carryforwards, and potential tax planning strategies which may be employed to prevent an operating loss or tax credit carryforward from expiring unused. In situations where a three-year cumulative loss condition exists, accounting standards limit the ability to consider projections of future results as positive evidence to assess the realizability of deferred tax assets. In Fiscal 2018, the Company’s financial results reflected a three-year cumulative loss. The three-year cumulative loss constitutes significant negative evidence, limiting the Company’s ability to consider other positive evidence, such as the Company’s projections for future growth. Based upon the aforementioned TCJA provision related to the net operating loss arising from years ending after December 31, 2017, the Company now can consider indefinite lived assets and the associated deferred tax liability as a source of future taxable income when assessing the potential to realize future tax deductions from indefinite carryforwards of net operating losses. Consequently, in Fiscal 2018 the Company recorded a non-cash benefit of $6.0 million primarily resulting from a reduction in valuation allowance against substantially all of its deferred tax assets. This valuation allowance has no effect on the Company’s ability to utilize the deferred tax assets to offset future taxable income, if generated. As required by GAAP, the Company will continue to assess the likelihood that the deferred tax assets will be realizable in the future and the valuation allowance will be adjusted accordingly. The tax benefits relating to any reversal of the valuation allowance on the net deferred tax assets in a future period will be recognized as a reduction of future income tax expense in that period.

In response to the enactment of TCJA in late 2017, the SEC issued Staff Accounting Bulletin No. 118 (“SAB 118”) to address situations where the accounting is incomplete for certain income tax effects of TCJA upon issuance of an entity’s financial statements for the reporting period in which TCJA was enacted. Under SAB 118, a company may record provisional amounts during a measurement period for specific income tax effects of the TCJA for which the accounting is incomplete but a reasonable estimate can be determined, and when unable to determine a reasonable estimate for any income tax effects, report provisional amounts in the first reporting period in which a reasonable estimate can be determined. The Company has recorded the impact of the tax effects of TCJA relying on estimates where the accounting is incomplete as of March 31, 2018. As guidance and technical corrections are issued in the upcoming quarters, the Company will record updates to its original provisional estimates.

In May 2018, the Company received notice from the Internal Revenue Service that it would be auditing the Company’s tax return for the period ended March 31, 2016. The audit is to begin at the end of June 2018.

Net deferred tax assets and liabilities consist of the following as of March 31, 2018 and 2017 (in thousands):



	2018 (As Restated)		2017
Deferred tax asset
Allowance for uncollectible accounts	$	7	$	14
Deferred rent		513		409
Accrued expenses		198		240
Deferred revenue		1,213		2,095
Asset retirement obligations		7		99
Net operating loss carryforward		30,925		33,933
Stock compensation expense		88		766
Total deferred tax asset		32,951		37,556
Deferred tax liability
Property and equipment		(375)		(640)
Definite-lived intangible assets		(1)		(8)
Indefinite-lived intangible assets		(6,060)		(6,498)
Total deferred tax liability		(6,436)		(7,146)
Total deferred tax assets and liabilities		26,515		30,410
Valuation allowance		(26,515)		(36,908)
Net deferred tax assets and liabilities	$	—	$	(6,498)

The components of the income tax expense for the years ended March 31, 2018 and 2017 are as follows (in thousands):


	2018 (As Restated)		2017
Current:
Federal	$	—	$	—
State		—		—
Total current		—		—

Deferred:
Federal		(5,971)		5,971
State		(527)		527
Total deferred		(6,498)		6,498

Total income tax (benefit) expense	$	(6,498)	$	6,498

The differences between the United States federal statutory tax rate and the Company's effective tax rate for the years ended March 31, 2018 and 2017 are as follows (in thousands):


	2018 (As Restated)			2017
Statutory federal tax	$	(10,563)	34%	$	(11,114)	34%
State income taxes, net of federal benefit		(932)	3%		(981)	3%
Other permanent differences		2,071	-7%		1,772	-5%
Restricted stock shortfall		(118)	0%		80	0%
Prior-year adjustments		58	0%		—	0%
Change in valuation allowance		2,986	-10%		16,719	-52%
Other		—	0%		22	0%
	$	(6,498)	21%	$	6,498	-20%

Stock Acquisition Rights, Stock Options and Warrants

12 Months Ended

Mar. 31, 2018

Stock Acquisition Rights, Stock Options and Warrants [Abstract]

Stock Acquisition Rights, Stock Options and Warrants

11. Stock Acquisition Rights, Stock Options and Warrants

The Company established the pdvWireless 2014 Stock Plan (the “2014 Stock Plan”) to attract, retain and reward individuals who contribute to the growth and profitability of the Company. This 2014 Stock Plan superseded previous stock plans although under such previous plans, 42,766 stock options were outstanding and vested as of March 31, 2018.

The Company’s Board of Directors has reserved 3,511,695 shares of common stock for issuance under its 2014 Stock Plan as of March 31, 2018. The number of shares will continue to automatically increase each January 1st through January 1, 2024 by an amount equal to the lesser of (i) 5% of the number of shares of common stock issued and outstanding on the immediately preceding December 31 or (ii) a lesser amount determined by the Board of Directors.

Restricted Stock and Restricted Stock Units

A summary of non-vested restricted stock activity for the years ended March 31, 2018 and 2017 is as follows:



		Weighted
		Average
	Restricted	Grant Day
	Stock	Fair Value
Non-vested restricted stock outstanding at March 31, 2016	140,872	$	26.47
Granted	44,898		21.59
Forfeited	(4,200)		(29.85)
Vested	(54,113)		(25.38)
Non-vested restricted stock outstanding at March 31, 2017	127,457		25.10
Granted	144,482		24.41
Forfeited	(1,638)		24.28
Vested	(52,488)		24.94
Non-vested restricted stock outstanding at March 31, 2018	217,813	$	24.69

The Company recognizes compensation expense for restricted stock on a straight-line basis over the explicit vesting period. Vested restricted stock units are settled and issuable upon the earlier of the date the employee ceases to be an employee of the Company or a date certain in the future. Stock compensation expense related to restricted stock was approximately $1.9 million for the year ended March 31, 2018 and $1.5 million for the year ended March 31, 2017. Stock compensation expense for restricted stock is accounted for in general and administrative expense in the Company’s Consolidated Statement of Operations. At March 31, 2018, there was $4.4 million of unvested compensation expense of the restricted stock, which is expected to be recognized over a weighted average period of 2.7 years.

Performance Stock Units

During the year ended March 31, 2018, the Company awarded 71,843 performance stock units under the 2014 Stock Plan. These performance stock units represent the number of shares of the Company’s common stock that the recipient would receive upon the Company’s attainment of the applicable performance goals. The units will vest in full upon attainment of the performance goals. Performance is based upon achievement, prior to January 13, 2020, of (A) a Final Order from the FCC providing for the creation and allocation of licenses for spectrum in the 900 MHz band consisting of paired blocks of contiguous spectrum, each containing at least 3 MHz of contiguous spectrum, authorized for broadband wireless communications uses and (B) the lack of objection by the Company's Board of Directors to the terms and conditions (including, but not limited to, the rebanding, clearing and relocation procedures, license assignment and award mechanisms, and technical and operational rules) set forth or referenced in the Final Order.

A summary of the Performance stock activity for the years ended March 31, 2018 and 2017 is as follows:


		Weighted
		Average
	Performance	Grant Day
	Stock	Fair Value
Performance stock outstanding at March 31, 2016	37,295	$	25.81
Granted	—		—
Forfeited	—		—
Vested	—		—
Performance stock outstanding at March 31, 2017	37,295		25.81
Granted	71,843		22.75
Forfeited	—		—
Vested	—		—
Performance stock outstanding at March 31, 2018	109,138	$	23.80

For the year end March 31, 2018, there was no stock compensation expense recognized for the performance units. At March 31, 2018, there was approximately $2.6 million of unvested compensation expense.

Stock Options

A summary of Stock Option activity for the years ended March 31, 2018 and 2017 is as follows:



	Options	Weighted Average Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Options outstanding at March 31, 2016	1,693,200	$	22.91
Options granted	110,000		24.59
Options exercised	(16,000)		(19.58)
Options forfeited/expired	(53,605)		(31.04)
Options outstanding at March 31, 2017	1,733,595		22.79
Options granted	252,945		25.39
Options exercised	(5,740)		(18.69)
Options forfeited/expired	(12,426)		(26.91)
Options outstanding at March 31, 2018	1,968,374	$	23.11	6.87	$	14,913,414
Exercisable at March 31, 2018	1,252,882	$	22.32	6.42	$	10,328,871
Total vested or expected to vest at March 31, 2018	1,952,859	$	23.09	6.86	$	14,838,577

The intrinsic value of options exercised was approximately $73,000 at March 31, 2018.

The stock options to purchase shares of common stock awarded during the fiscal year ended March 31, 2018 have a ten-year contractual life and 25% will vest on the first anniversary of grant, and the remainder will vest in three equal annual installments thereafter. In addition, a stock option to purchase 100,000 shares of common stock awarded to a consultant during the twelve months ended March 31, 2018 vest monthly over four years. Shares granted to employees are subject to vesting, future settlement conditions and other such terms as determined by the Board of Directors and set forth in the applicable award agreements.

Additional information regarding stock options outstanding at March 31, 2018 is as follows:



										Weighted
						Weighted				Average
						Average	Weighted			Exercise Price
Exercise					Number	Remaining	Average		Options	of Shares
Prices					Outstanding	Life in Years	Exercise Price		Exercisable	Exercisable
$	13.25	-	$	20.00	1,127,378	6.05	$	19.75	859,065	$	19.67
	20.01	-		46.23	760,445	8.05		25.49	350,579		25.65
	46.24	-		72.85	80,551	7.09		47.87	43,238		47.96
					1,968,374	6.87	$	23.11	1,252,882	$	22.32

The fair value of options granted is estimated on the date of grant using the Black-Scholes option valuation model. This stock-based compensation expense valuation model requires the Company to make assumptions and judgments regarding the variables used in the calculation. These variables include the expected term, the expected volatility of the Company’s common stock, expected risk-free interest rate, forfeiture rate and expected dividends. The Company calculates it expected term and volatility from the historical volatilities and terms of selected comparable public companies within its industry along with the Company’s short history regarding these variables. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for periods corresponding with the expected life of the option. The Company estimates its forfeiture rate based on an analysis of its actual forfeitures and will continue to evaluate the appropriateness of the forfeiture rate based on actual forfeiture experience, analysis of employee turnover and other factors. The Company has never paid, and does not anticipate paying, any cash dividends in the foreseeable future, and therefore uses an expected dividend yield of zero in the option-pricing model.

The following assumptions were used to calculate the fair value of options:



	Year Ended	Year Ended
	March 31, 2018	March 31, 2017
Risk-free interest rate	1.76% to 2.73%	1.07% to 2.39%
Dividend yield	-%	-%
Volatility	49.05%	46%
Expected term	5 years	5 years
Forfeiture rate	3%	2%

Performance Stock Options

During the year ended March 31, 2018, the Company awarded options to purchase 129,945 shares of common stock with an average exercise price of $25.84 that vest immediately upon meeting certain performance conditions. These options have a ten-year contractual life. The performance options will vest in full upon attainment of the performance goals. Performance is based upon achievement, prior to January 13, 2020, of (A) a Final Order from the FCC providing for the creation and allocation of licenses for spectrum in the 900 MHz band consisting of paired blocks of contiguous spectrum, each containing at least 3 MHz of contiguous spectrum, authorized for broadband wireless communications uses and (B) the lack of objection by the Company's Board of Directors to the terms and conditions (including, but not limited to, the rebanding, clearing and relocation procedures, license assignment and award mechanisms, and technical and operational rules) set forth or referenced in the Final Order.

A summary of the Performance Stock Options as of March 31, 2018 and 2017 is as follows:



	Performance Options	Weighted Average Exercise Price		Weighted Average ContractualTerm	Aggregate Intrinsic Value
Performance Options outstanding at March 31, 2016	50,000	$	25.81
Performance Options granted	—		—
Performance Options exercised	—		—
Performance Options forfeited/expired	—		—
Performance Options outstanding at March 31, 2017	50,000		25.81
Performance Options granted	129,945		25.84
Performance Options exercised	—		—
Performance Options forfeited/expired	—		—
Performance Options outstanding at March 31, 2018	179,945	$	25.83	8.87	$	—

Stock compensation expense related to the amortization of the fair value of service based stock options issued was approximately $3.7 million, $3.2 million and $4.6 million for the years ended March 31, 2018, 2017, and 2016 respectively. There was no stock compensation expense related to the performance stock options issued. Stock compensation expense is included as part of general and administrative expense in the accompanying Consolidated Statement of Operations. The weighted average fair value for the stock option awards granted for the fiscal year ended March 31, 2018 was $11.63. As of March 31, 2018, there was approximately $5.0 million of unrecognized compensation cost related to non-vested share options granted under the Company’s stock option plans, of which $3.0 million pertains to the non-performance based stock options. The cost of the service based stock options is expected to be recognized over a weighted-average period of 2.7 years.

Warrants

A summary of Warrant activity is as follows:



	Warrants	Weighted Average Exercise Price
Warrants outstanding at March 31, 2016	6,039	$	82.79
Expired	(6,039)		(82.79)
Warrants outstanding at March 31, 2017	—	$	—
Issued, cancelled, expired	—		—
Warrants outstanding at March 31, 2018	—	$	—

The outstanding warrants expired in June 2016.

Motorola Investment

On September 15, 2014, Motorola invested $10.0 million to purchase 500,000 Class B Units of the Company’s subsidiary, PDV Spectrum Holding Company, LLC (at a price equal to $20.00 per unit). The Company owns 100% of the Class A Units in this subsidiary. Motorola has the right at any time to convert its 500,000 Class B Units into 500,000 shares of the Company’s common stock. The Company also has the right to force Motorola’s conversion into shares of its common stock. Motorola is not entitled to any assets, profits or distributions from the operations of the subsidiary. In addition, Motorola’s conversion ratio from Class B Units to shares of the Company’s common stock is fixed on a one-for-one basis, and is not dependent on the performance or valuation of either the company or the subsidiary. The Class B Units have no redemption or call provisions and can only be converted into shares of the Company’s common stock. Management has determined that this investment does not meet the criteria for temporary equity or non-controlling interest due to the limited rights that Motorola has as a holder of Class B Units, and accordingly has presented this investment as part of its permanent equity within Additional Paid-in Capital in the accompanying financial statements.

Supplemental Disclosure of Cash Flow Information	12 Months Ended
Supplemental Disclosure of Cash Flow Information	Mar. 31, 2018
Supplemental Disclosure of Cash Flow Information [Abstract]
Supplemental Disclosure of Cash Flow Information	12. Supplemental Disclosure of Cash Flow Information For the year ended March 31, 2018, the Company paid in cash approximately $95,000 in taxes and approximately $3,000 in interest. The Company paid in cash approximately $40,000 in taxes and approximately $5,000 in interest during the year ended March 31, 2017. The Company paid approximately $4,000 in taxes and approximately $3,000 in interest payments for the year ended March 31, 2016. During the year ended March 31, 2017, the Company entered into a barter transaction with a third party whereby it acquired wireless licenses valued at approximately $307,000 consisting of approximately $269,000 related to use of the Company’s network along with radios and approximately $39,000 in cash. The Company capitalized asset retirement obligations that amounted to approximately $34,000 and $52,000, respectively, for the years ended March 31, 2018 and March 31, 2017. During the 2016 fiscal year, the Company purchased wireless licenses valued at $1.5 million consisting of $200,000 in cash and approximately $1.3 million in the form of a promissory note (see Note 9). The Company capitalized asset retirement obligations that amounted to approximately $204,000.

Commitments and Contingencies

12 Months Ended

Mar. 31, 2018

Commitments and Contingencies [Abstract]

Commitments and Contingencies

13. Commitments and contingencies

Leasing Obligations

The Company is obligated under certain lease agreements for office space whose leases expire on various dates from January 7, 2019 through March 31, 2027, which includes a ten-year lease extension for the corporate office. The Company entered into multiple lease agreements for tower space related to its TeamConnect business. The lease expiration dates range from February 28, 2020 to June 30, 2026.

Rent expense amounted to approximately $2.5 million, approximately $1.9 million, and approximately $1.1 million for the years ended March 31, 2018, 2017, and 2016, respectively, of which approximately $1.6 million, approximately $1.4 million, and approximately $0.7 million, respectively, was classified as cost of revenue and the remainder of approximately $0.9 million, approximately $0.5 million, and approximately $0.4 million, respectively, was classified in operating expenses in the Consolidated Statements of Operations. At March 31, 2018, accumulated deferred rent payable amounted to approximately $2.1 million and is included as part of other liabilities in the accompanying Consolidated Balance Sheet.

Aggregate rentals, under non-cancelable leases for office and tower space (exclusive of real estate taxes, utilities, maintenance and other costs borne by the Company) for the remaining terms of the leases for year ended March 31, 2018 are as follows (in thousands):




		2018
2019	$	2,197
2020		2,144
2021		1,846
2022		1,487
2023		1,306
After 2023		3,986
Total	$	12,966

Severance Plan Participation Agreement

On March 27, 2015, the Company entered into a Severance Plan Participation Agreement (the “Participation Agreement”) with its executive officers and certain key employees pursuant to the Company’s Executive Severance Plan (the “Severance Plan”) approved by the Compensation Committee of the Board of Directors. The Severance Plan establishes the amount of severance payments and benefits available in the event of a (i) termination of employment by the Company without Cause or by the participant for Good Reason and (ii) termination of employment by the Company without Cause or by the participant for Good Reason 6 months before or within 24 months after a Change in Control (as defined in the Severance Plan).

The Severance Plan establishes three tiers of executives: Tier 1, Tier 2 and Tier 3. Within each tier the Severance Plan stipulates the severance payments payable to each employee, the effect of equity awards granted, and the provisions for health insurance.

Litigation

In addition to commitments and obligations in the ordinary course of business, the Company may be subject, from time to time, to various claims and pending and potential legal actions arising out of the normal conduct of its business. The Company assesses contingencies to determine the degree of probability and range of possible loss for potential accrual in its financial statements. Because litigation is inherently unpredictable and unfavorable resolutions could occur, assessing litigation contingencies is highly subjective and requires judgments about future events. When evaluating contingencies, the Company may be unable to provide a meaningful estimate due to a number of factors, including the procedural status of the matter in question, the presence of complex or novel legal theories, and/or the ongoing discovery and development of information important to the matters. In addition, damage amounts claimed in litigation against it may be unsupported, exaggerated or unrelated to possible outcomes, and as such are not meaningful indicators of its potential liability.

The Company regularly reviews contingencies to determine the adequacy of its accruals and related disclosures. During the period presented, the Company has not recorded any accrual for loss contingencies associated with such claims or legal proceedings; determined that an unfavorable outcome is probable or reasonably possible; or determined that the amount or range of any possible loss is reasonably estimable. However, the outcome of legal proceedings and claims brought against the Company is subject to significant uncertainty. Therefore, although management considers the likelihood of such an outcome to be remote, if one or more of these legal matters were resolved against the Company in a reporting period, the Company’s consolidated financial statements for that reporting period could be materially adversely affected.

Concentrations of Credit Risk	12 Months Ended
Concentrations of Credit Risk	Mar. 31, 2018
Concentrations of Credit Risk [Abstract]
Concentrations of Credit Risk	14. Concentrations of Credit Risk Financial instruments which potentially expose the Company to concentrations of credit risk consist primarily of cash and trade accounts receivable. The Company places its cash and temporary cash investments with financial institutions for which credit loss is not anticipated. The Company sells its pdvConnect product and extends credit predominately to two third-party carriers. The Company maintains allowances for doubtful accounts based on factors surrounding the write-off history, aging analysis, and any specific known troubled accounts.

Business Concentrations	12 Months Ended
Business Concentrations	Mar. 31, 2018
Business Concentrations [Abstract]
Business Concentrations	15. Business Concentrations For the year ended March 31, 2018, the Company had one Tier 1 domestic carrier that accounted for approximately 39% of operating revenue. For the years ended March 31, 2017 and March 31, 2016, two Tier 1 carriers accounted for approximately 38% and 10% and 39% and 20%, respectively, of operating revenue. For the 2018, 2017, and 2016 fiscal years, operating revenues principally were from domestic sales. As of March 31, 2018, and 2017, the Company had one Tier 1 domestic carrier that accounted for approximately 53% and 67%, respectively, of its accounts receivable.

Selected Quarterly Financial Data

12 Months Ended

Mar. 31, 2018

Selected Quarterly Financial Data [Abstract]

Selected Quarterly Financial Data

16. Selected Quarterly Financial Data

Selected financial data by quarter was as follows (in thousands, except per share data):



	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Full Year
Fiscal Year 2018 ended March 31, 2018	(Unaudited)		(Unaudited)		(As Restated) (Unaudited)		(As Restated) (Unaudited)		(As Restated)
Operating revenues	$	1,465	$	1,513	$	1,601	$	1,776	$	6,355
Gross loss	$	(235)	$	(398)	$	(415)	$	(495)	$	(1,543)
Net loss	$	(7,910)	$	(8,199)	$	(99)	$	(8,360)	$	(24,568)
Net loss per common share basic and diluted	$	(0.55)	$	(0.57)	$	(0.01)	$	(0.59)	$	(1.70)



	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Fiscal Year 2017 ended March 31, 2017	(Unaudited)		(Unaudited)		(Unaudited)		(Unaudited)		Full Year
Operating revenues	$	1,045	$	1,141	$	1,335	$	1,264	$	4,787
Gross profit (loss)	$	(539)	$	(534)	$	(497)	$	(694)	$	(2,262)
Net loss	$	(10,052)	$	(7,833)	$	(7,288)	$	(14,014)	$	(39,186)
Net loss per common share basic and diluted	$	(0.70)	$	(0.54)	$	(0.51)	$	(0.97)	$	(2.72)

Subsequent Events	12 Months Ended
Subsequent Events	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	17. Subsequent Events CEO Transition and Consulting Agreements On April 23, 2018, the Company announced that its Board of Directors had determined that it was in the best interests of the Company and its stockholders to shift the Company’s focus and resources to pursuing its regulatory initiatives at the FCC and preparing for the future deployment of broadband and other advanced technologies and services. In light of this continued shift in focus, the Board also approved a chief executive officer transition plan, under which, John Pescatore, the Company’s chief executive officer and president, transitioned to the position of vice chairman and Morgan O’Brien, the Company’s then-current vice chairman, assumed the position as the Company’s new chief executive officer, effective as of April 23, 2018. In connection with the transition, the Company and Mr. Pescatore entered into a Continued Service, Consulting and Transition Agreement and a separate Consulting Agreement. Under the Transition Agreement, Mr. Pescatore transitioned to serving as vice chairman and will continue serving as an employee of the Company through September 30, 2018, during which time he will receive his prorated annual salary and bonus. As part of the Consulting Agreement, Mr. Pescatore will receive $66,667 per month for the first 24 months of consulting services and no fees for the remaining 12 months of consulting services. Mr. Pescatore will also receive a bonus of $260,000 under the Company’s short-term incentive plan for his services to the Company during the fiscal year ended March 31, 2018. The Company has agreed to pay Mr. Pescatore $140,000 on September 30, 2018 for his delivery of a Mutual Bring-Down Release. In the quarter ended June 30, 2018, the Company will record a liability of $1.7 million for the cash payments under both the Transition and Consulting Agreements. In addition, the Company will record an additional $2.8 million non-cash, stock compensation expense due to modifications of Mr. Pescatore’s stock grants. Restructuring Plan On June 1, 2018, the Company’s Board of Directors approved an initial plan to restructure its business aimed at reducing the future operating costs of its TeamConnect and pdvConnect businesses and better aligning and focusing its business priorities on its spectrum initiatives, including increasing the efficiency and capacity of its spectrum to enable the future deployment of broadband and other advanced technologies and services. As part of the restructuring plan, the Company eliminated approximately 20 positions, or 20% of its workforce, primarily from its TeamConnect and pdvConnect businesses. The Company expects to record a restructuring charge in the first quarter of fiscal 2019 of approximately $0.3 million, primarily related to employee severance and benefit costs. The actions associated with the restructuring announcement are anticipated to be completed by June 30, 2018. Loss of pdvConnect Revenues In addition, the Company received information from one of its Tier 1 carrier partners that the largest customer of its pdvConnect service planned to discontinue its use of that service during Fiscal 2019. The revenues generated from this customer were $2.4 million, $1.8 million, and $1.4 million for the years ended March 31, 2018, 2017, and 2016, respectively, which represented 37%, 37% and 38% of total operating revenues for those same fiscal years, respectively.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Mar. 31, 2018

Summary of Significant Accounting Policies [Abstract]

Basis of Presentation and Use of Estimates

Reclassifications

Cash and Cash Equivalents

Allowance for Doubtful Accounts

Inventory

Property and Equipment

Accounting for Asset Retirement Obligations

As of March 31, 2018, the Company had an asset retirement obligation of approximately $0.3 million.

Changes in the liability for the asset retirement obligations for the years ended March 31, 2018 and 2017 are summarized below (in thousands):


	2018		2017
Balance at beginning of the year	$	268	$	204
Additional liabilities accrued		34		52
Accretion expense		14		12
Balance at end of the year	$	316	$	268

Intangible Assets

Patent Costs

Long-Lived Asset Impairment

Fair Value of Financial Instruments

Revenue Recognition

Cost of Revenue

Shipping and Handling Costs

Indirect Sales Commissions

Product Development Costs

Advertising and Promotional Expense

Stock Compensation

No tax benefits have been attributed to the share-based compensation expense because the Company maintains a full valuation allowance for all net deferred tax assets.

Income Taxes

Accounting for Uncertainty in Income Taxes

Net Loss Per Share of Common Stock

Recently Issued Accounting Pronouncements

During the first quarter of Fiscal 2019, the Company will record a cumulative adjustment to accumulated deficit that is primarily composed of the following:

a net contract asset related to the portion of the Company’s revenues associated with service plans that are sold concurrently with a subsidized handset; and

an asset related to costs incurred to acquire a contract, which primarily relates to the deferral of commission expenses.

Subsequent Events Evaluation by Management

Restatement of Previously Issued Consolidated Financial Statements (Tables)

12 Months Ended

Mar. 31, 2018

Restatement of Previously Issued Consolidated Financial Statements [Abstract]

Schedule of Restatement of Previously Issued Financial Statements


	As of March 31, 2018
	As
	Originally
	Reported		Adjustments		As Restated
Liabilities
Deferred income tax liability	$	6,060	$	(6,060)	$	—
Total liabilities		17,871		(6,060)		11,811

Stockholders' Equity
Accumulated deficit	$	(133,299)	$	6,060	$	(127,239)
Total stockholders' equity		202,469		6,060		208,529


	Year ended March 31, 2018
	As
	Originally
	Reported		Adjustments		As Restated
Income tax benefit	$	(438)	$	(6,060)	$	(6,498)
Net loss		(30,628)		6,060		(24,568)
Net loss per common share basic and diluted	$	(2.12)	$	0.42	$	(1.70)


			Total
	Accumulated		Stockholders'
	Deficit		Equity
Balance at March 31, 2018, As Reported	$	(133,299)	$	202,469
Adjustments		6,060		6,060
Balance at March 31, 2018, As Restated	$	(127,239)	$	208,529


	Year ended March 31, 2018
	As
	Originally
	Reported		Adjustments		As Restated
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$	(30,628)	$	6,060	$	(24,568)
Adjustments to reconcile net loss to net cash used by operating activities
Deferred Income Tax		(438)		(6,060)		(6,498)
Net cash flows used by operating activities	$	(21,986)		—	$	(21,986)

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2018

Summary of Significant Accounting Policies [Abstract]

Summary of Changes in Liability For Asset Retirement Obligations


	2018		2017
Balance at beginning of the year	$	268	$	204
Additional liabilities accrued		34		52
Accretion expense		14		12
Balance at end of the year	$	316	$	268

Inventory (Tables)

12 Months Ended

Mar. 31, 2018

Inventory [Abstract]

Schedule of Inventory




	2018		2017
Mobile devices	$	88	$	39
Handsets		51		65
Accessories		34		24
Total inventory	$	173	$	128

Property and Equipment (Tables)

12 Months Ended

Mar. 31, 2018

Property and Equipment [Abstract]

Components of Property and Equipment



	Estimated
	useful life	2018		2017
Network sites and equipment	5-10 years	$	15,263	$	13,999
Computer equipment	5-7 years		184		944
Computer software	1-3 years		10		13
Furniture and fixture and other equipment	2-5 years		1,418		1,091
Leasehold improvements	Shorter of the lease term or 10 years		344		141
			17,219		16,188
Less accumulated depreciation			5,468		3,590
			11,751		12,598
Construction in process			1,024		1,911
Property and equipment, net		$	12,775	$	14,509

Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2018

Intangible Assets [Abstract]

Schedule of Indefinite-Lived Intangible Assets


	Wireless Licenses
Balance at March 31, 2016	$	103,655
Acquisitions		1,021
Balance at March 31, 2017	$	104,676
Acquisitions		1,931
Balance at March 31, 2018	$	106,606

Accounts Payable and Accrued Expenses (Tables)

12 Months Ended

Mar. 31, 2018

Accounts Payable and Accrued Expenses [Abstract]

Schedule of Accounts Payable and Accrued Expenses



	2018		2017
Accounts payable and accrued expenses
Accounts payable	$	569	$	670
Accrued employee related expenses		2,337		2,385
Accrued expenses		630		222
Other		787		122
Total accounts payable and accrued expenses	$	4,322	$	3,399

Income Taxes (Tables)

12 Months Ended

Mar. 31, 2018

Income Taxes [Abstract]

Schedule of Net Deferred Tax Assets and Liabilities



	2018 (As Restated)		2017
Deferred tax asset
Allowance for uncollectible accounts	$	7	$	14
Deferred rent		513		409
Accrued expenses		198		240
Deferred revenue		1,213		2,095
Asset retirement obligations		7		99
Net operating loss carryforward		30,925		33,933
Stock compensation expense		88		766
Total deferred tax asset		32,951		37,556
Deferred tax liability
Property and equipment		(375)		(640)
Definite-lived intangible assets		(1)		(8)
Indefinite-lived intangible assets		(6,060)		(6,498)
Total deferred tax liability		(6,436)		(7,146)
Total deferred tax assets and liabilities		26,515		30,410
Valuation allowance		(26,515)		(36,908)
Net deferred tax assets and liabilities	$	—	$	(6,498)

Schedule of Components of Income Tax Expense


	2018 (As Restated)		2017
Current:
Federal	$	—	$	—
State		—		—
Total current		—		—

Deferred:
Federal		(5,971)		5,971
State		(527)		527
Total deferred		(6,498)		6,498

Total income tax (benefit) expense	$	(6,498)	$	6,498

Schedule of Effective Income Tax Rate Reconciliation


	2018 (As Restated)			2017
Statutory federal tax	$	(10,563)	34%	$	(11,114)	34%
State income taxes, net of federal benefit		(932)	3%		(981)	3%
Other permanent differences		2,071	-7%		1,772	-5%
Restricted stock shortfall		(118)	0%		80	0%
Prior-year adjustments		58	0%		—	0%
Change in valuation allowance		2,986	-10%		16,719	-52%
Other		—	0%		22	0%
	$	(6,498)	21%	$	6,498	-20%

Stock Acquisition Rights, Stock Options and Warrants (Tables)

12 Months Ended

Mar. 31, 2018

Stock Acquisition Rights, Stock Options and Warrants [Abstract]

Summary of Restricted Stock and Restricted Stock Units Activity



		Weighted
		Average
	Restricted	Grant Day
	Stock	Fair Value
Non-vested restricted stock outstanding at March 31, 2016	140,872	$	26.47
Granted	44,898		21.59
Forfeited	(4,200)		(29.85)
Vested	(54,113)		(25.38)
Non-vested restricted stock outstanding at March 31, 2017	127,457		25.10
Granted	144,482		24.41
Forfeited	(1,638)		24.28
Vested	(52,488)		24.94
Non-vested restricted stock outstanding at March 31, 2018	217,813	$	24.69

Summary of Performance Stock Activity


		Weighted
		Average
	Performance	Grant Day
	Stock	Fair Value
Performance stock outstanding at March 31, 2016	37,295	$	25.81
Granted	—		—
Forfeited	—		—
Vested	—		—
Performance stock outstanding at March 31, 2017	37,295		25.81
Granted	71,843		22.75
Forfeited	—		—
Vested	—		—
Performance stock outstanding at March 31, 2018	109,138	$	23.80

Summary of Stock Option Activity



	Options	Weighted Average Exercise Price		Weighted Average Contractual Term	Aggregate Intrinsic Value
Options outstanding at March 31, 2016	1,693,200	$	22.91
Options granted	110,000		24.59
Options exercised	(16,000)		(19.58)
Options forfeited/expired	(53,605)		(31.04)
Options outstanding at March 31, 2017	1,733,595		22.79
Options granted	252,945		25.39
Options exercised	(5,740)		(18.69)
Options forfeited/expired	(12,426)		(26.91)
Options outstanding at March 31, 2018	1,968,374	$	23.11	6.87	$	14,913,414
Exercisable at March 31, 2018	1,252,882	$	22.32	6.42	$	10,328,871
Total vested or expected to vest at March 31, 2018	1,952,859	$	23.09	6.86	$	14,838,577

Schedule of Additional Information Regarding Stock Options Outstanding



										Weighted
						Weighted				Average
						Average	Weighted			Exercise Price
Exercise					Number	Remaining	Average		Options	of Shares
Prices					Outstanding	Life in Years	Exercise Price		Exercisable	Exercisable
$	13.25	-	$	20.00	1,127,378	6.05	$	19.75	859,065	$	19.67
	20.01	-		46.23	760,445	8.05		25.49	350,579		25.65
	46.24	-		72.85	80,551	7.09		47.87	43,238		47.96
					1,968,374	6.87	$	23.11	1,252,882	$	22.32

Schedule of Assumptions used to Calculate Fair Value of Options



	Year Ended	Year Ended
	March 31, 2018	March 31, 2017
Risk-free interest rate	1.76% to 2.73%	1.07% to 2.39%
Dividend yield	-%	-%
Volatility	49.05%	46%
Expected term	5 years	5 years
Forfeiture rate	3%	2%

Summary of Performance Stock Options



	Performance Options	Weighted Average Exercise Price		Weighted Average ContractualTerm	Aggregate Intrinsic Value
Performance Options outstanding at March 31, 2016	50,000	$	25.81
Performance Options granted	—		—
Performance Options exercised	—		—
Performance Options forfeited/expired	—		—
Performance Options outstanding at March 31, 2017	50,000		25.81
Performance Options granted	129,945		25.84
Performance Options exercised	—		—
Performance Options forfeited/expired	—		—
Performance Options outstanding at March 31, 2018	179,945	$	25.83	8.87	$	—

Summary of Warrant Activity



	Warrants	Weighted Average Exercise Price
Warrants outstanding at March 31, 2016	6,039	$	82.79
Expired	(6,039)		(82.79)
Warrants outstanding at March 31, 2017	—	$	—
Issued, cancelled, expired	—		—
Warrants outstanding at March 31, 2018	—	$	—

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

+ References + Details

Commitments and Contingencies (Tables)

12 Months Ended

Mar. 31, 2018

Commitments and Contingencies [Abstract]

Aggregate Rentals Under Non-cancelable Leases For Office And Plant Space




		2018
2019	$	2,197
2020		2,144
2021		1,846
2022		1,487
2023		1,306
After 2023		3,986
Total	$	12,966

Selected Quarterly Financial Data (Tables)

12 Months Ended

Mar. 31, 2018

Selected Quarterly Financial Data [Abstract]

Schedule of Selected Financial Data By Quarter



	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Full Year
Fiscal Year 2018 ended March 31, 2018	(Unaudited)		(Unaudited)		(As Restated) (Unaudited)		(As Restated) (Unaudited)		(As Restated)
Operating revenues	$	1,465	$	1,513	$	1,601	$	1,776	$	6,355
Gross loss	$	(235)	$	(398)	$	(415)	$	(495)	$	(1,543)
Net loss	$	(7,910)	$	(8,199)	$	(99)	$	(8,360)	$	(24,568)
Net loss per common share basic and diluted	$	(0.55)	$	(0.57)	$	(0.01)	$	(0.59)	$	(1.70)



	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Fiscal Year 2017 ended March 31, 2017	(Unaudited)		(Unaudited)		(Unaudited)		(Unaudited)		Full Year
Operating revenues	$	1,045	$	1,141	$	1,335	$	1,264	$	4,787
Gross profit (loss)	$	(539)	$	(534)	$	(497)	$	(694)	$	(2,262)
Net loss	$	(10,052)	$	(7,833)	$	(7,288)	$	(14,014)	$	(39,186)
Net loss per common share basic and diluted	$	(0.70)	$	(0.54)	$	(0.51)	$	(0.97)	$	(2.72)

Nature of Operations (Details)	12 Months Ended
Nature of Operations (Details)	Mar. 31, 2018 item
Nature of Operations [Abstract]
Metropolitan market areas	7

Restatement of Previously Issued Consolidated Financial Statements (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Restatement of Previously Issued Consolidated Financial Statements [Abstract]
Operating loss carryforwards, term		20 years
Income tax expense (benefit)	$ 5,600	$ (6,498)	$ 6,498

Restatement of Previously Issued Consolidated Financial Statements (Schedule of Restatement of Previously Issued Financial Statements) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2018	Mar. 31, 2017
Liabilities
Deferred income tax liability													$ 6,498
Total liabilities												$ 11,811	17,590
Stockholders' equity
Accumulated deficit												(127,239)	(102,671)
Total stockholders' equity	$ 208,529			$ 227,896	$ 227,896			$ 262,186	$ 227,896	$ 262,186	$ 214,207	208,529	227,896
Income tax expense (benefit)					5,600				(6,498)	6,498
Net loss	$ (8,360)	$ (99)	$ (8,199)	$ (7,910)	$ (14,014)	$ (7,288)	$ (7,833)	$ (10,052)	$ (24,568)	$ (39,186)	$ (21,828)
Net loss per common share basic and diluted	$ (0.59)	$ (0.01)	$ (0.57)	$ (0.55)	$ (0.97)	$ (0.51)	$ (0.54)	$ (0.70)	$ (1.70)	$ (2.72)	$ (1.54)
Balance				$ 227,896				$ 262,186	$ 227,896	$ 262,186	$ 214,207
Balance	$ 208,529				$ 227,896				208,529	227,896	262,186
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	(8,360)	$ (99)	$ (8,199)	(7,910)	(14,014)	$ (7,288)	$ (7,833)	(10,052)	(24,568)	(39,186)	(21,828)
Adjustments to reconcile net loss to net cash used by operating activities
Deferred Income Tax									(6,498)	6,498
Net cash flows used by operating activities									(21,986)	(26,504)	(19,794)
As Originally Reported [Member]
Liabilities
Deferred income tax liability												6,060
Total liabilities												17,871
Stockholders' equity
Accumulated deficit												(133,299)
Total stockholders' equity	202,469								202,469			202,469
Income tax expense (benefit)									(438)
Net loss									$ (30,628)
Net loss per common share basic and diluted									$ (2.12)
Balance	202,469								$ 202,469
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss									(30,628)
Adjustments to reconcile net loss to net cash used by operating activities
Deferred Income Tax									(438)
Net cash flows used by operating activities									(21,986)
Adjustments [Member]
Liabilities
Deferred income tax liability												(6,060)
Total liabilities												(6,060)
Stockholders' equity
Accumulated deficit												6,060
Total stockholders' equity	6,060								6,060			6,060
Income tax expense (benefit)									(6,060)
Net loss									$ 6,060
Net loss per common share basic and diluted									$ 0.42
Adjustments												6,060
Balance	6,060								$ 6,060
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss									6,060
Adjustments to reconcile net loss to net cash used by operating activities
Deferred Income Tax									(6,060)
Accumulated Deficit [Member]
Stockholders' equity
Total stockholders' equity	(127,239)			(102,671)	(102,671)			(63,485)	(102,671)	(63,485)	(41,657)	(127,239)	$ (102,671)
Net loss									(24,568)	(39,186)	(21,828)
Balance				$ (102,671)				$ (63,485)	(102,671)	(63,485)	(41,657)
Balance	(127,239)				$ (102,671)				(127,239)	(102,671)	(63,485)
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss									(24,568)	$ (39,186)	$ (21,828)
Accumulated Deficit [Member] \| As Originally Reported [Member]
Stockholders' equity
Total stockholders' equity	(133,299)								(133,299)			(133,299)
Balance	$ (133,299)								$ (133,299)
Accumulated Deficit [Member] \| Adjustments [Member]
Stockholders' equity
Adjustments												$ 6,060

Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Apr. 01, 2018	Sep. 30, 2014
Summary Of Significant Accounting Policies [Line Items]
Allowance for doubtful accounts	$ 29,000	$ 53,000
Asset retirement obligation	$ 316,000	268,000	$ 204,000
Prepaid price					$ 7,500,000
Wireless licenses term	10 years
Lease term	10 years
Advertising and promotional expense	$ 155,000	$ 103,000	$ 161,000
Tax benefits attributed to share-based compensation expense	$ 0
Potentially dilutive securities outstanding but excluded from computation of earnings per share	1,002,000	709,000	900,000
Contract acquisition costs	$ 30,183,000	$ 30,521,000	$ 22,005,000
Accounting Standards Update 2014-09 [Member]
Summary Of Significant Accounting Policies [Line Items]
Contract acquisition costs	700,000
Patents [Member]
Summary Of Significant Accounting Policies [Line Items]
Gross patent costs	572,000	572,000
Accumulated amortization	375,000	362,000
Amortization expense	13,000	$ 13,000	$ 11,000
Estimated amortization expense,next twelve months	13,000
Estimated amortization expense,year two	13,000
Estimated amortization expense,year three	13,000
Estimated amortization expense,year four	13,000
Estimated amortization expense,year five	$ 13,000
Minimum [Member] \| Subsequent Event [Member] \| Accounting Standards Update 2014-09 [Member]
Summary Of Significant Accounting Policies [Line Items]
Decrease to accumulated deficit				$ 700,000
Maximum [Member] \| Subsequent Event [Member] \| Accounting Standards Update 2014-09 [Member]
Summary Of Significant Accounting Policies [Line Items]
Decrease to accumulated deficit				$ 900,000

Summary of Significant Accounting Policies (Summary of Changes in Liability For Asset Retirement Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Summary of Significant Accounting Policies [Abstract]
Balance at beginning of the year	$ 268	$ 204
Additional liabilities accrued	34	52
Accretion expense	14	12
Balance at end of the year	$ 316	$ 268

Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Inventory [Line Items]
Total inventory	$ 173	$ 128
Mobile Devices [Member]
Inventory [Line Items]
Total inventory	88	39
Handsets [Member]
Inventory [Line Items]
Total inventory	51	65
Accessories [Member]
Inventory [Line Items]
Total inventory	$ 34	$ 24

Property and Equipment (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Property and Equipment [Abstract]
Depreciation	$ 2.8	$ 2.2	$ 0.5
Depreciation classified as cost of revenue	2.6	$ 2.0	$ 0.4
Construction in process	$ 0.5

Property and Equipment (Components of Property and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 17,219	$ 16,188
Less accumulated depreciation	5,468	3,590
Property and equipment, net before construction work in progress	11,751	12,598
Construction in process	1,024	1,911
Property and equipment, net	12,775	14,509
Network Sites and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 15,263	13,999
Network Sites and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life	5 years
Network Sites and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life	10 years
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 184	944
Computer Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life	5 years
Computer Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life	7 years
Computer Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 10	13
Computer Software [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life	1 year
Computer Software [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life	3 years
Furniture and Fixture and Other Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,418	1,091
Furniture and Fixture and Other Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life	2 years
Furniture and Fixture and Other Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 344	$ 141
Leasehold Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Estimated useful life	10 years

Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Indefinite-lived Intangible Assets [Line Items]
Balance	$ 104,676
Balance	106,606	$ 104,676
Wireless Licenses [Member]
Indefinite-lived Intangible Assets [Line Items]
Balance	104,676	103,655
Acquisitions	1,931	1,021
Balance	$ 106,606	$ 104,676

Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Accounts Payable and Accrued Expenses [Abstract]
Accounts payable	$ 569	$ 670
Accrued employee related expenses	2,337	2,385
Accrued expenses	630	222
Other	787	122
Total accounts payable and accrued expenses	$ 4,322	$ 3,399

Accounts Payable - Officers (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Accounts Payable - Officers [Abstract]
Accounts payable - officers	$ 94	$ 36

Note Payable (Details) - USD ($)	12 Months Ended
Note Payable (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Line of Credit Facility [Line Items]
Line of credit, amount	$ 0
Promissory note [Member]
Line of Credit Facility [Line Items]
Debt instrument, amount			$ 1,289,013
Debt instrument, maturity			Mar. 15, 2018
Debt instrument, interest rate			0.55%
Debt instrument, repayment amount	497,265	$ 494,545
Notes Payable [Member]
Line of Credit Facility [Line Items]
Total interest expense on all notes payable	$ 3,000	$ 5,000	$ 3,000

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Line Items]
Statutory federal tax, percent	21.00%		35.00%	34.00%	34.00%
Income tax expense (benefit)		$ 5,600		$ (6,498)	$ 6,498
Net operating loss carryforwards		90,000		34,200	90,000
Deferred tax assets		$ 33,900		30,900	$ 33,900
Adjustment to valuation allowance				$ 6,000
Earliest Tax Year [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, expiration year				Dec. 31, 2019
Latest Tax Year [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, expiration year				Dec. 31, 2037

Income Taxes (Schedule of Net Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Deferred tax asset
Allowance for uncollectible accounts	$ 7	$ 14
Deferred rent	513	409
Accrued expenses	198	240
Deferred revenue	1,213	2,095
Asset retirement obligations	7	99
Net operating loss carryforward	30,925	33,933
Stock compensation expense	88	766
Total deferred tax asset	32,951	37,556
Deferred tax liability
Property and equipment	(375)	(640)
Total deferred tax liability	(6,436)	(7,146)
Total deferred tax assets and liabilities	26,515	30,410
Valuation allowance	(26,515)	(36,908)
Net deferred tax assets and liabilities		(6,498)
Definite-Lived Intangible Assets [Member]
Deferred tax liability
Intangible assets	(1)	(8)
Indefinite-lived Intangible Assets [Member]
Deferred tax liability
Intangible assets	$ (6,060)	$ (6,498)

Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Current:
Federal
State
Total current
Deferred:
Federal		(5,971)	5,971
State		(527)	527
Total deferred		(6,498)	6,498
Total income tax (benefit) expense	$ 5,600	$ (6,498)	$ 6,498

Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2018	Mar. 31, 2017
Income Taxes [Abstract]
Statutory federal tax				$ (10,563)	$ (11,114)
State income taxes, net of federal benefit				(932)	(981)
Other permanent differences				2,071	1,772
Restricted stock shortfall				(118)	80
Prior-year adjustments				58
Change in valuation allowance				2,986	16,719
Other					22
Total income tax (benefit) expense		$ 5,600		$ (6,498)	$ 6,498
Statutory federal tax, percent	21.00%		35.00%	34.00%	34.00%
State income taxes, net of federal benefit, percent				3.00%	3.00%
Other permanent differences, percent				(7.00%)	(5.00%)
Restricted stock shortfall, percent				0.00%	0.00%
Prior-year adjustments, percent				0.00%	0.00%
Change in valuation allowance, percent				(10.00%)	(52.00%)
Other, percent				0.00%	0.00%
Total income tax expense, percent				21.00%	(20.00%)

Stock Acquisition Rights, Stock Options and Warrants (Narrative) (Details) - USD ($)		12 Months Ended
	Sep. 15, 2014	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense		$ 3,700,000	$ 3,200,000	$ 4,600,000
Weighted average fair value for each stock option award granted		$ 11.63
Unrecognized compensation cost related to non-vested share options granted		$ 5,000,000
Unvested compensation expense		$ 3,000,000
Weighted average period of recognition of unrecognized compensation cost		2 years 8 months 12 days
Subsidiary equity units for which investor has right to convert to common stock	500,000
Warrants outstanding				6,039
2014 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding		42,766
Common stock authorized and reserved for issuance		3,511,695
Percentage of increase in number of shares of common stock issued and outstanding		5.00%
Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of units owned	100.00%
PDV Spectrum Holding Company, LLC [Member] \| Common Class B Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period value to purchase of assets	$ 10,000,000
Sale of stock, Shares	500,000
Sale of stock, price per share	$ 20.00
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense		$ 1,900,000	$ 1,500,000
Unvested compensation expense		$ 4,400,000
Weighted average period of recognition of unrecognized compensation cost		2 years 8 months 12 days
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding		179,945	50,000	50,000
Stock compensation expense		$ 0
Unvested compensation expense		$ 2,600,000
Stock options awarded		129,945
Exercise price per share		$ 25.84
Stock awards issued		71,843
Stock options, contractual life		10 years
Performance Shares [Member] \| 2014 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards issued		71,843
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding		1,968,374	1,733,595	1,693,200
Intrinsic value of options exercised		$ 73,000
Stock options awarded		252,945	110,000
Exercise price per share		$ 25.39	$ 24.59
Stock options, contractual life		10 years
Stock Option [Member] \| Consultant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options awarded		100,000
Stock Option [Member] \| First Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting for stock granted to employees		25.00%
Non-Vested Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards issued		144,482	44,898

Stock Acquisition Rights, Stock Options and Warrants (Summary of Restricted Stock and Restricted Stock Units Activity) (Details) - Non-Vested Restricted Stock [Member] - $ / shares	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Outstanding (shares)	127,457	140,872
Stock, Granted (shares)	144,482	44,898
Stock, Forfeited (shares)	(1,638)	(4,200)
Stock, Vested (shares)	(52,488)	(54,113)
Stock Outstanding (shares)	217,813	127,457
Weighted Average Grant Day Fair Value, Stock Outstanding	$ 25.10	$ 26.47
Weighted Average Grant Day Fair Value, Stock, Granted	24.41	21.59
Weighted Average Grant Day Fair Value, Stock, Forfeited	(24.28)	(29.85)
Weighted Average Grant Day Fair Value, Stock, Vested	(24.94)	(25.38)
Weighted Average Grant Day Fair Value, Stock Outstanding	$ 24.69	$ 25.10

Stock Acquisition Rights, Stock Options and Warrants (Summary of Performance Stock Activity) (Details) - Performance Shares [Member] - $ / shares	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Outstanding (shares)	37,295	37,295
Stock, Granted (shares)	71,843
Stock, Forfeited (shares)
Stock, Vested (shares)
Stock Outstanding (shares)	109,138	37,295
Weighted Average Grant Day Fair Value, Stock Outstanding	$ 25.81	$ 25.81
Weighted Average Grant Day Fair Value, Stock, Granted	22.75
Weighted Average Grant Day Fair Value, Stock, Forfeited
Weighted Average Grant Day Fair Value, Stock, Vested
Weighted Average Grant Day Fair Value, Stock Outstanding	$ 23.80	$ 25.81

Stock Acquisition Rights, Stock Options and Warrants (Summary of Stock Option Activity) (Details) - Stock Option [Member] - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding (shares)	1,733,595	1,693,200
Options, Granted (shares)	252,945	110,000
Options, Exercised (shares)	(5,740)	(16,000)
Options, Forfeited/Expired (shares)	(12,426)	(53,605)
Options Outstanding (shares)	1,968,374	1,733,595
Options, Exercisable (shares)	1,252,882
Options, Total vested or expected to vest (shares)	1,952,859
Weighted Average Exercise Price, Options outstanding	$ 22.79	$ 22.91
Weighted Average Exercise Price, Granted	25.39	24.59
Weighted Average Exercise Price, Exercised	(18.69)	(19.58)
Weighted Average Exercise Price, forfeited/expired	(26.91)	(31.04)
Weighted Average Exercise Price, Options outstanding	23.11	$ 22.79
Weighted Average Exercise Price, Exercisable	22.32
Weighted Average Exercise Price, Total vested and expected to vest	$ 23.09
Weighted Average Contractual Term, Options outstanding	6 years 10 months 13 days
Weighted Average Contractual Term, Exercisable	6 years 5 months 1 day
Weighted Average Contractual Term, Total vested and expected to vest	6 years 10 months 10 days
Aggregate Intrinsic Value, Options Outstanding	$ 14,913,414
Aggregate Intrinsic Value, Exercisable	10,328,871
Aggregate Intrinsic Value, Total vested and expected to vest	$ 14,838,577

Stock Acquisition Rights, Stock Options and Warrants (Schedule of Additional Information Regarding Stock Options Outstanding) (Details) - Stock Option [Member]	12 Months Ended
	Mar. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding (shares) \| shares	1,968,374
Weighted Average Remaining Life in Years	6 years 10 months 13 days
Weighted Average Exercise Prices	$ 23.11
Options Exercisable (shares) \| shares	1,252,882
Weighted Average Exercise Price of Shares Exercisable	$ 22.32
$13.25 - $20.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Prices, Minimum	13.25
Exercise Prices, Maximum	$ 20.00
Number Outstanding (shares) \| shares	1,127,378
Weighted Average Remaining Life in Years	6 years 18 days
Weighted Average Exercise Prices	$ 19.75
Options Exercisable (shares) \| shares	859,065
Weighted Average Exercise Price of Shares Exercisable	$ 19.67
$20.01 - $46.23 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Prices, Minimum	20.01
Exercise Prices, Maximum	$ 46.23
Number Outstanding (shares) \| shares	760,445
Weighted Average Remaining Life in Years	8 years 18 days
Weighted Average Exercise Prices	$ 25.49
Options Exercisable (shares) \| shares	350,579
Weighted Average Exercise Price of Shares Exercisable	$ 25.65
$46.25 - $72.85 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise Prices, Minimum	46.24
Exercise Prices, Maximum	$ 72.85
Number Outstanding (shares) \| shares	80,551
Weighted Average Remaining Life in Years	7 years 1 month 2 days
Weighted Average Exercise Prices	$ 47.87
Options Exercisable (shares) \| shares	43,238
Weighted Average Exercise Price of Shares Exercisable	$ 47.96

Stock Acquisition Rights, Stock Options and Warrants (Schedule of Assumptions used to Calculate Fair Value of Options) (Details) - Stock Option [Member]	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Risk-free interest rate, minimum	1.76%	1.07%
Risk-free interest rate, maximum	2.73%	2.39%
Dividend yield
Volatility	49.05%	46.00%
Expected term	5 years	5 years
Forfeiture rate	3.00%	2.00%

Stock Acquisition Rights, Stock Options and Warrants (Summary of Performance Stock Options) (Details) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding (shares)	1,733,595	1,693,200
Options, Granted (shares)	252,945	110,000
Options, Exercised (shares)	(5,740)	(16,000)
Options, Forfeited/Expired (shares)	(12,426)	(53,605)
Options Outstanding (shares)	1,968,374	1,733,595
Weighted Average Exercise Price, Options outstanding	$ 22.79	$ 22.91
Weighted Average Exercise Price, Granted	25.39	24.59
Weighted Average Exercise Price, Exercised	18.69	19.58
Weighted Average Exercise Price, Forfeited/Expired	26.91	31.04
Weighted Average Exercise Price, Options outstanding	$ 23.11	$ 22.79
Weighted Average Contractual Term, Options outstanding	6 years 10 months 13 days
Aggregate Intrinsic Value, Options Outstanding	$ 14,913,414
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding (shares)	50,000	50,000
Options, Granted (shares)	129,945
Options, Exercised (shares)
Options, Forfeited/Expired (shares)
Options Outstanding (shares)	179,945	50,000
Weighted Average Exercise Price, Options outstanding	$ 25.81	$ 25.81
Weighted Average Exercise Price, Granted	25.84
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Forfeited/Expired
Weighted Average Exercise Price, Options outstanding	$ 25.83	$ 25.81
Weighted Average Contractual Term, Options outstanding	8 years 10 months 13 days

Stock Acquisition Rights, Stock Options and Warrants (Summary of Warrant Activity) (Details) - $ / shares	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock Acquisition Rights, Stock Options and Warrants [Abstract]
Warrants Outstanding (shares)		6,039
Warrants, Expired (shares)		(6,039)
Warrants Outstanding (shares)
Weighted Average Exercise Price		$ 82.79
Weighted Average Exercise Price, Expired		(82.79)
Weighted Average Exercise Price

Supplemental Disclosure of Cash Flow Information (Details) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Noncash or Part Noncash Acquisitions [Line Items]
Taxes paid	$ 95,000	$ 40,000	$ 4,000
Interest paid	3,000	5,000	3,000
Cash purchases	1,931,000	750,000	2,068,000
Asset retirement obligation	316,000	268,000	204,000
Wireless Licenses [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Exchanges, net		307,000
Acquisitions, free service		269,000
Cash purchases		39,000	200,000
Asset retirement obligation	$ 34,000	$ 52,000
Promissory note assumed			1,300,000
Acquisitions			$ 1,500,000

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Commitments And Contingencies [Line Items]
Lease rent expense	$ 2.5	$ 1.9	$ 1.1
Accumulated deferred rent payable	$ 2.1
Minimum [Member]
Commitments And Contingencies [Line Items]
Term before or after termination	6 months
Maximum [Member]
Commitments And Contingencies [Line Items]
Term before or after termination	24 months
Cost of Revenue [Member]
Commitments And Contingencies [Line Items]
Lease rent expense	$ 1.6	1.4	0.7
Operating Expense [Member]
Commitments And Contingencies [Line Items]
Lease rent expense	$ 0.9	$ 0.5	$ 0.4
Office Space [Member] \| Minimum [Member]
Commitments And Contingencies [Line Items]
Lease expiration date	Jan. 07, 2019
Office Space [Member] \| Maximum [Member]
Commitments And Contingencies [Line Items]
Lease expiration date	Mar. 31, 2027
Tower Space [Member] \| Minimum [Member]
Commitments And Contingencies [Line Items]
Lease expiration date	Feb. 28, 2020
Tower Space [Member] \| Maximum [Member]
Commitments And Contingencies [Line Items]
Lease expiration date	Jun. 30, 2026

Commitments and Contingencies (Aggregate Rentals Under Non-cancelable Leases For Office And Plant Space) (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Commitments and Contingencies [Abstract]
2019	$ 2,197
2020	2,144
2021	1,846
2022	1,487
2023	1,306
After 2023	3,986
Total	$ 12,966

Business Concentrations (Details) - Customer Concentration Risk [Member] - item	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Operating Revenue [Member]
Concentration Risk [Line Items]
Number of carriers	1	2	2
Accounts Receivable [Member]
Concentration Risk [Line Items]
Number of carriers	1	1
Tier 1 Carrier Partner [Member] \| Operating Revenue [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	37.00%	37.00%	38.00%
Carriers One [Member] \| Operating Revenue [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	39.00%	38.00%	39.00%
Carriers One [Member] \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	53.00%	67.00%
Carriers Two [Member] \| Operating Revenue [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		10.00%	20.00%

Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Selected Quarterly Financial Data [Abstract]
Operating revenues	$ 1,776	$ 1,601	$ 1,513	$ 1,465	$ 1,264	$ 1,335	$ 1,141	$ 1,045	$ 6,355	$ 4,787	$ 3,544
Gross profit (loss)	(495)	(415)	(398)	(235)	(694)	(497)	(534)	(539)	(1,543)	(2,262)	75
Net loss	$ (8,360)	$ (99)	$ (8,199)	$ (7,910)	$ (14,014)	$ (7,288)	$ (7,833)	$ (10,052)	$ (24,568)	$ (39,186)	$ (21,828)
Net loss per common share basic and diluted	$ (0.59)	$ (0.01)	$ (0.57)	$ (0.55)	$ (0.97)	$ (0.51)	$ (0.54)	$ (0.70)	$ (1.70)	$ (2.72)	$ (1.54)

Subsequent Events (Details)			3 Months Ended	12 Months Ended
Subsequent Events (Details)	Jun. 01, 2018 employee	Apr. 23, 2018 USD ($) $ / mo	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Scenario, Forecast [Member]
Subsequent Event [Line Items]
Restructuring charge			$ 300,000
John Pescatore [Member] \| Scenario, Forecast [Member]
Subsequent Event [Line Items]
Amount due to related party			1,700,000
Stock compensation expense			$ 2,800,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Positions eliminated \| employee	20
Percentage of positions eliminated	20.00%
Subsequent Event [Member] \| John Pescatore [Member]
Subsequent Event [Line Items]
Salary \| $ / mo		66,667
Subsequent Event [Member] \| John Pescatore [Member] \| Bonus [Member]
Subsequent Event [Line Items]
Amount due to related party		$ 260,000
Subsequent Event [Member] \| John Pescatore [Member] \| Mutual Bring-Down Release [Member]
Subsequent Event [Line Items]
Amount due to related party		$ 140,000
Customer Concentration Risk [Member] \| Operating Revenue [Member] \| Tier 1 Carrier Partner [Member]
Subsequent Event [Line Items]
Revenue				$ 2,400,000	$ 1,800,000	$ 1,400,000
Concentration risk, percentage				37.00%	37.00%	38.00%