Anterix (ATEX) 10-Q 16 Nov 20 2021 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Sep. 30, 2020	Nov. 11, 2020
Document And Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Fiscal Year Focus	2021
Document Period End Date	Sep. 30, 2020
Current Fiscal Year End Date	--03-31
Document Transition Report	false
Entity File Number	001-36827
Entity Registrant Name	Anterix Inc.
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	3 Garret Mountain Plaza
Entity Address, Address Line Two	Suite 401
Entity Address, City or Town	Woodland Park
Entity Address, State or Province	NJ
Entity Tax Identification Number	33-0745043
Entity Address, Postal Zip Code	07424
City Area Code	973
Local Phone Number	771-0300
Title of 12(b) Security	Common Stock, $0.0001 par value
Trading Symbol	ATEX
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		17,494,639
Amendment Flag	false
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001304492

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Current Assets
Cash and cash equivalents	$ 116,210	$ 137,453
Accounts receivable, net of allowance for doubtful accounts of $8 and $12, respectively	59	61
Prepaid expenses and other current assets	2,358	4,638
Total current assets	118,627	142,152
Property and equipment, net	4,755	7,000
Right of use assets, net	5,665	6,500
Intangible assets	117,341	111,526
Equity method investment	23	39
Other assets	210	180
Total assets	246,621	267,397
Current liabilities
Accounts payable and accrued expenses	4,016	5,649
Due to related parties	114	110
Restructuring reserve	89	636
Operating lease liabilities	1,531	1,695
Deferred revenue	729	733
Total current liabilities	6,479	8,823
Noncurrent liabilities
Operating lease liabilities	6,254	7,051
Deferred revenue	2,368	2,733
Deferred income tax	3,240	3,084
Other liabilities	982	640
Total liabilities	19,323	22,331
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.0001 par value per share, 10,000,000 shares authorized and no shares outstanding at September 30, 2020 and March 31, 2020
Common stock, $0.0001 par value per share, 100,000,000 shares authorized and 17,487,201 shares issued and outstanding at September 30, 2020 and 17,184,712 shares issued and outstanding at March 31, 2020	2	2
Additional paid-in capital	464,620	450,978
Accumulated deficit	(237,324)	(205,914)
Total stockholders' equity	227,298	245,066
Total liabilities and stockholders' equity	$ 246,621	$ 267,397

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 8	$ 12
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	17,487,201	17,184,712
Common Stock, shares outstanding	17,487,201	17,184,712

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating revenues
Operating revenues	$ 248,000	$ 423,000	$ 504,000	$ 876,000
Operating expenses
Direct cost of revenue (exclusive of depreciation and amortization)	515,000	699,000	1,063,000	1,617,000
General and administrative	5,582,000	4,557,000	11,320,000	9,405,000
Sales and support	631,000	759,000	1,292,000	1,973,000
Product development	805,000	555,000	1,497,000	1,236,000
Depreciation and amortization	1,190,000	636,000	2,398,000	1,277,000
Stock compensation expense	8,618,000	1,412,000	10,573,000	2,989,000
Restructuring costs	8,000	50,000	21,000	160,000
Impairment of long-lived assets	0	0	29,000	0
Total operating expenses	17,349,000	8,668,000	28,193,000	18,657,000
(Gain)/loss from disposal of intangible assets, net	(829,000)		3,849,000
(Gain)/loss from disposal of long-lived assets, net	(5,000)	61,000	(6,000)	62,000
Loss from operations	(16,267,000)	(8,306,000)	(31,532,000)	(17,843,000)
Interest income	31,000	634,000	72,000	988,000
Other income	113,000	113,000	222,000	214,000
(Loss)/income on equity method investment	(12,000)	15,000	(16,000)	15,000
Loss before income taxes	(16,135,000)	(7,544,000)	(31,254,000)	(16,626,000)
Income tax expense	145,000	171,000	156,000	463,000
Net loss	$ (16,280,000)	$ (7,715,000)	$ (31,410,000)	$ (17,089,000)
Net loss per common share basic and diluted	$ (0.94)	$ (0.46)	$ (1.82)	$ (1.09)
Weighted-average common shares used to compute basic and diluted net loss per share	17,350,386	16,634,154	17,279,349	15,702,673
Service [Member]
Operating revenues
Operating revenues	$ 66,000	$ 241,000	$ 140,000	$ 512,000
Spectrum [Member]
Operating revenues
Operating revenues	$ 182,000	$ 182,000	$ 364,000	$ 364,000

Consolidated Statement of Stock

Consolidated Statement of Stockholders’ Equity - USD ($) $ in Thousands		Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Mar. 31, 2019		$ 1	$ 349,039	$ (168,276)	$ 180,764
Balance, Shares at Mar. 31, 2019		14,739,145
Issuance of stock during July 2019 follow-on offering, net of closing costs		$ 1	94,243		94,244
Issuance of stock during July 2019 follow-on offering, net of closing costs, Shares		2,222,223
Equity based compensation	[1]		2,989		2,989
Equity based compensation, Shares	[1]	80,697
Stock option exercises			2,020		2,020
Stock option exercises, Shares		94,323
Shares withheld for taxes			(446)		(446)
Shares withheld for taxes, Shares		(10,450)
Net loss				(17,089)	(17,089)
Balance at Sep. 30, 2019		$ 2	447,845	(185,365)	262,482
Balance, Shares at Sep. 30, 2019		17,125,938
Balance at Jun. 30, 2019		$ 1	352,193	(177,650)	174,544
Balance, Shares at Jun. 30, 2019		14,840,113
Issuance of stock during July 2019 follow-on offering, net of closing costs		$ 1	94,243		94,244
Issuance of stock during July 2019 follow-on offering, net of closing costs, Shares		2,222,223
Equity based compensation	[1]		1,412		1,412
Equity based compensation, Shares	[1]	55,844
Stock option exercises			301		301
Stock option exercises, Shares		15,000
Shares withheld for taxes			(304)		(304)
Shares withheld for taxes, Shares		(7,242)
Net loss				(7,715)	(7,715)
Balance at Sep. 30, 2019		$ 2	447,845	(185,365)	262,482
Balance, Shares at Sep. 30, 2019		17,125,938
Balance at Mar. 31, 2020		$ 2	450,978	(205,914)	245,066
Balance, Shares at Mar. 31, 2020		17,184,712
Equity based compensation	[1]		10,573		10,573
Equity based compensation, Shares	[1]	206,440
Equity payment of prior year accrued employee related expenses			1,537		1,537
Equity payment of prior year accrued employee related expenses, Shares		23,932
Stock option exercises			1,532		1,532
Stock option exercises, Shares		72,117
Net loss				(31,410)	(31,410)
Balance at Sep. 30, 2020		$ 2	464,620	(237,324)	227,298
Balance, Shares at Sep. 30, 2020		17,487,201
Balance at Jun. 30, 2020		$ 2	455,489	(221,044)	234,447
Balance, Shares at Jun. 30, 2020		17,289,027
Equity based compensation	[1]		8,618		8,618
Equity based compensation, Shares	[1]	167,975
Equity payment of prior year accrued employee related expenses, Shares		4,199
Stock option exercises			513		513
Stock option exercises, Shares		26,000
Net loss				(16,280)	(16,280)
Balance at Sep. 30, 2020		$ 2	$ 464,620	$ (237,324)	$ 227,298
Balance, Shares at Sep. 30, 2020		17,487,201
[1]	includes restricted shares

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (31,410,000)	$ (17,089,000)
Adjustments to reconcile net loss to net cash used by operating activities
Depreciation and amortization	2,398,000	1,277,000
Non-cash compensation expense attributable to stock awards	10,573,000	2,989,000
Deferred income taxes	156,000	463,000
Bad debt expense		49,000
Net loss from disposal of intangible assets	3,849,000
(Gain)/loss on disposal of long-lived assets, net	(6,000)	74,000
Impairment of long-lived assets	29,000	0
Loss/(income) on equity method investment	16,000	(15,000)
Changes in operating assets and liabilities
Accounts receivable	2,000	381,000
Prepaid expenses and other assets	(163,000)	546,000
Right of use assets	841,000	698,000
Accounts payable and accrued expenses	505,000	(1,247,000)
Due to related parties	4,000	(69,000)
Restructuring reserve	(547,000)	(1,537,000)
Operating lease liabilities	(961,000)	(661,000)
Deferred revenue	(369,000)	(397,000)
Other liabilities	342,000	(5,000)
Net cash used by operating activities	(14,741,000)	(14,543,000)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of intangible assets, including refundable deposits	(7,829,000)	(202,000)
Purchases of equipment	(205,000)	(301,000)
Net cash used by investing activities	(8,034,000)	(503,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from July 2019 follow-on offering		94,244,000
Proceeds from stock option exercises	1,532,000	2,020,000
Payments of withholding tax on net issuance of restricted stock		(446,000)
Net cash provided by financing activities	1,532,000	95,818,000
Net change in cash and cash equivalents	(21,243,000)	80,772,000
CASH AND CASH EQUIVALENTS
Beginning of the period	137,453,000	76,722,000
End of the period	116,210,000	157,494,000
Cash paid during the period:
Taxes paid	33,000	21,000
Noncash Investing Items [Abstract]
Contribution of capital equipment to TeamConnect LLC		$ 14,000
Network equipment provided in exchange for wireless licenses	23,000
Non-cash financing activities:
Equity payment of prior year accrued employee related expenses	$ 1,537,000

Nature of Operations

Nature of Operations	6 Months Ended
	Sep. 30, 2020
Nature of Operations [Abstract]
Nature of Operations	1. Nature of Operations  Anterix Inc. (the “Company”) is a wireless communications company focused on commercializing its spectrum assets to enable its targeted utility and critical infrastructure customers to deploy private broadband networks, technologies and solutions. The Company is the largest holder of licensed spectrum in the 900 MHz band (896-901/935-940 MHz) with nationwide coverage throughout the contiguous United States, Hawaii, Alaska and Puerto Rico. On May 13, 2020, the Federal Communications Commission (“FCC”) approved a Report and Order to modernize and realign the 900 MHz band to increase its usability and capacity by allowing it to be utilized for the deployment of broadband networks, technologies and solutions (the “Report and Order”). The Report and Order was published in the Federal Register on July 16, 2020 and became effective on August 17, 2020. The Company is now engaged in qualifying for and securing broadband licenses from the FCC, with a focus on pursuing licenses in those counties in which it believes it has near-term commercial opportunities. At the same time, the Company’s sales and marketing organization is pursuing opportunities to lease the broadband licenses it secures to its targeted utility and critical infrastructure customers.  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. On August 6, 2019, the Company changed its name from pdvWireless, Inc. to Anterix Inc. The Company maintains offices in Woodland Park, New Jersey and McLean, Virginia.  Historical Business Operations  Historically, the Company generated revenue principally from its pdvConnect and TeamConnect businesses. pdvConnect is a mobile communication and workforce management solution. The Company historically marketed pdvConnect primarily through two Tier 1 carriers in the United States. In Fiscal 2016, it began offering a commercial push-to-talk (“PTT”) service, which was marketed as TeamConnect, in seven major metropolitan areas throughout the United States, including Atlanta, Baltimore/Washington, Chicago, Dallas, Houston, New York and Philadelphia. It primarily offered the TeamConnect service to customers indirectly through third-party sales representatives who were primarily selected from Motorola’s nationwide dealer network.  In June 2018, the Company announced its plan to restructure its operations to align and focus its business priorities on its broadband spectrum initiatives. Consistent with this restructuring plan, the Company transferred its TeamConnect business in December 2018 to A BEEP LLC (“A BEEP”) and Goosetown Enterprises, Inc (“Goosetown”), with the Company continuing to provide customer care, billing and collection services through April 1, 2019. On December 31, 2018, the Company entered into a memorandum of understanding (“MOU”) with the principals of Goosetown. Under the terms of the MOU, the Company assigned the intellectual property rights to its TeamConnect and pdvConnect related applications to TeamConnect LLC (the “LLC”). The LLC assumed customer care services related to the pdvConnect service, with the Company providing transition services to the LLC through April 1, 2019. On April 1 , 2020, the Company transferred its pdvConnect customers to the LLC and the LLC agreed to pay the Company a certain portion of the recurring revenues from these customers.  Follow-on Offering  In July 2019, the Company completed a registered follow-on offering in which it sold 2,222,223 shares of its common stock at a purchase price to the public of $45.00 per share. Net proceeds were approximately $94.2 million after deducting $5.5 million in underwriting discounts and commissions, and $0.3 million in offering expenses.  Executive Succession Plan  On June 25, 2020, the Company issued a press release announcing an effective date of July 1, 2020 for its executive leadership succession plan (the “ Succession Plan ”), which followed the achievement of the FCC Report and Order.  TeamConnect LLC  On August 4, 2020, we entered into Amendment 2 (“Amendment 2”) to the IP Assignment, Software Support, and Development Services Agreement, dated as of January 7, 2019, as previously amended, by and between us and TeamConnect, LLC (the “LLC”). Under Amendment 2, we agreed to transfer our pdvConnect customers to the LLC, effective as of April 1, 2020 , except for one Tier 1 domestic carrier . In exchange for the customer transfer, the LLC agreed to pay us a certain portion of the recurring revenues from these customers.

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Sep. 30, 2020
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies  Basis of Presentation and Use of Estimates  The unaudited consolidated financial statements and accompanying notes are prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information. Pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”), certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted.  Because certain information and footnote disclosures have been condensed or omitted, these unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2020, as filed on May 28, 2020 with the SEC. In the Company’s opinion all normal and recurring adjustments considered necessary for a fair presentation of the financial position, results of operations and cash flows for the periods presented have been included. The Company believes that the disclosures made in the unaudited consolidated interim financial statements are adequate to make the information not misleading. The results of operations for the interim periods presented are not necessarily indicative of the results for the year. 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. New estimates in the period relate to determining the Company’s estimated incremental borrowing rate in recognizing right of use assets and operating lease liabilities. 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 three and six months ended September 30, 2020. These reclassifications had no effect on previously reported net loss or net loss per common share basic and diluted.  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. On May 13, 2020, the FCC approved the Report and Order to modernize and realign the 900 MHz band to increase its usability and capacity by allowing it to be utilized for the deployment of broadband networks, technologies and solutions. The Report and Order was published in the Federal Register on July 16, 2020 and became effective on August 17, 2020. The Company is now engaged in qualifying for and securing broadband licenses from the FCC, with a focus on pursuing licenses in those counties in which it believes it has near-term commercial opportunities. 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 annually on an aggregate basis, as the Company will be utilizing the wireless licenses on an integrated basis as part of developing broadband. In the year ended March 31, 2020, (“Fiscal 2020”), the Company performed a step zero qualitative approach to test indefinite-lived intangible assets for impairment by first assessing qualitative factors to determine whether it is more-likely-than-not that the fair value of an indefinite-lived intangible asset is impaired as a basis for determining whether it is necessary to perform quantitative impairment testing. There are no triggering events indicating impairment in the three and six months ended September 30, 2020.  See Note 4 “Intangible Assets” for a discussion of the Company’s (gain)/ loss from the disposal of intangible assets incurred during the period ended September 30, 2020.  Long-Lived Asset and Right of Use Asset Impairment  The Company evaluates long-lived assets, including right of use 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 the asset groups are 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. During the six months ended September 30, 2020, the Company recorded a $29,000 non-cash impairment charge for long-lived assets consisting of $29,000 for network site costs to reduce the carrying values to zero . There was no impairment charge for the three months ended September 30, 2020 and three and six months ended September 30, 2019.  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, stock options, restricted stock and warrants are considered to be potentially dilutive securities. Because the Company has reported a net loss for the three and six months ended September 30, 2020 and 2019, respectively, 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 1,540,000 and 1,409,000 at September 30, 2020 and 2019, 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 June 2016, the FASB issued ASC 326, Financial Instruments - Credit Losses and has subsequently modified several areas of the standard in order to provide additional clarity and improvements. The new standard requires entities to use a Current Expected Credit Loss impairment model based on expected losses rather than incurred losses. Under this model, an entity would recognize an impairment allowance equal to its current estimate of all contractual cash flows that the entity does not expect to collect from financial assets measured at amortized cost within the scope of the standard. The entity's estimate would consider relevant information about past events, current conditions and reasonable and supportable forecasts, which will result in recognition of lifetime expected credit losses. As a smaller reporting company, the standard will be effective for the Company's fiscal year beginning April 2023, including interim reporting periods within that fiscal year, although early adoption is permitted. The Company is evaluating the potential impact that ASC 326 and subsequent modifications may have on its consolidated financial statements.  Other accounting standards that have been issued or proposed by the FASB or other standard-setting bodies that do not require adoption until a future date are not expected to have a material impact on the Company’s consolidated financial statements upon adoption.

Revenue

Revenue	6 Months Ended
	Sep. 30, 2020
Revenue [Abstract]
Revenue	3. Revenue  In December 201 8, the Company’s board of directors (the “Board”) approved the transfer of its TeamConnect business and support for its pdvConnect business to help reduce operating costs and to allow the Company to focus on its FCC initiatives and future broadband opportunities. Specifically, the Company entered into: (i) a Customer Acquisition and Resale Agreement with A BEEP on January 2, 2019, (ii) a Customer Acquisition, Resale and Licensing Agreement with Goosetown on January 2, 2019 and (iii) a n MOU with the principals of Goosetown on December 31, 2018. Under the A BEEP and Goosetown Agreements, the Company agreed to: (i) transfer its TeamConnect customers located in the Atlanta, Chicago, Dallas, Houston and Phoenix metropolitan markets to A BEEP, (ii) transfer its TeamConnect customers located in the Baltimore/Washington DC, Philadelphia and New York metropolitan markets to Goosetown, (iii) provide A BEEP and Goosetown with access to MotoTRBO Systems and (iv) grant A BEEP and Goosetown the right to resell access to the MotoTRBO Systems pursuant to separate Mobile Virtual Network Operation arrangements for a two -year period. The Company also granted Goosetown a license to sell the business applications the Company developed for its TeamConnect service. On March 31, 2019, the agreements were amended to formally set the transition date for the businesses as April 1, 2019 and to clarify the responsibilities between the parties.  Under these agreements, A BEEP and Goosetown agreed to provide customer care, billing and collection services for their respective acquired customers. The Company continued to provide these services through April 1, 2019 to help facilitate the transitioning of the acquired customers. Additionally, the Company is required to maintain and pay all site lease, backhaul and utility costs required to operate the MotoTRBO Systems for a two -year period. As part of the Company’s efforts to clear the 900 MHz spectrum for broadband use, A BEEP and Goosetown are required to migrate the acquired customers off the MotoTRBO Systems over the two -year period. In consideration for the customers and rights the Company transferred, A BEEP and Goosetown are required to pay a certain portion of the recurring revenues they receive from the acquired customers ranging from 100% to 20% during the terms of the agreements. Additionally, A BEEP is required to pay the Company a portion of recurring revenue from customers who utilize A BEEP’s push-to-talk Diga-talk Plus application service ranging from 35% to 15% for a period of two years. For a period of two years, Goosetown is required to pay the Company 20% of recurring revenues from the TeamConnect applications it licensed.  Under the terms of the MOU that the Company entered into with the principals of Goosetown on December 31, 2018, the Company assigned the intellectual property rights to its TeamConnect and pdvConnect related applications to the LLC. The LLC also assumed customer care services related to the pdvConnect service, with the Company providing transition services to the LLC through April 1, 2019. On April 1, 2020, the Company transferred its pdvConnect customers to the LLC, and the LLC agreed to pay the Company a certain portion of the recurring revenues from these customers.  In accordance with ASC 606, when the customer purchased or received a discounted handset in connection with entering into a contract for service, the Company allocated revenue between the handset and the service based on the relative standalone selling price. Revenue was recognized when the performance obligation which includes providing the services or transferring control of promised handsets, which are distinct to a customer, had been satisfied. Revenue was recognized in an amount that reflects the consideration the Company expects to be entitled to for those performance obligations.  Service Revenue . The Company has historically derived its service revenue from a fixed monthly recurring unit price per user, with 30-day payment terms, for its pdvConnect and TeamConnect service offerings.  pdvConnect is a proprietary cloud-based mobile resource management solution which has historically been sold as a separate software-as-a-service offering for dispatch-centric business customers who utilize Tier 1 cellular networks, and to a lesser extent, who utilize land mobile radio networks not operated by the Company. pdvConnect was historically sold directly by the Company or through two Tier 1 domestic carriers. The service is contracted and billed on a month-to-month basis, and the Company satisfies its performance obligation over time as the services are delivered. On April 1, 2020, these customers were transferred to the LLC, except for one Tier 1 domestic carrier. The LLC agreed to pay the Company a certain portion of the recurring revenues from the transferred customers through the term of the agreement.  TeamConnect combines pdvConnect with push-to-talk (“PTT”) mobile communication services involving digital network architecture and mobile devices. The contract period for the TeamConnect service varies from a month-to-month basis to 24 months. The customer is billed at the beginning of each month of the contract term. The Company recognizes revenue as it satisfies its performance obligation over time as the services are delivered. On April 1, 2019, these customers were transitioned to A BEEP and Goosetown. A BEEP and Goosetown agreed to pay the Company a certain portion of the recurring revenues during the term of the agreements. While the customer remains on the Company’s MotoTRBO Systems, the portion of recurring revenues paid by A BEEP and Goosetown is recorded as revenue.  Spectrum Revenue. In September 201 4, Motorola paid the Company an upfront, fully-paid fee of $7.5 million in order to use 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 and is recognized ratably as the service is provided over the contractual term of approximately ten years. The revenue recognized for the three and six months ended September 3 0 , 2020 and 2019 w ere approximately $182,000 and $364,000 , respectively for each period .  Contract Assets. Contract assets include the portion of the Company’s future service invoices which have been allocated to the discounted price of the radios and amortized as a reduction against service revenue over the contract period.  The Company also recognizes a contract asset for the incremental costs of obtaining a contract with a customer. These costs include commissions for salespeople and commissions paid to third-party dealers. These costs are amortized ratably using the portfolio approach over the estimated customer contract period. The Company reviews the contract asset on a periodic basis to determine if an impairment exists. If it is determined that there is an impairment, the contract asset will be expensed. Under the previous accounting standard, the Company expensed commissions as incurred.  As a result of transferring customers to A BEEP and Goosetown, all contract and contract acquisition costs were impaired for the six months ended September 30, 2019 . The Company increased direct cost of revenue amounting to $178,000 and sales and support expense amounting to $258,000 for the six months ended September 30 , 20 19 . The Company did not incur contract and contract acquisition costs for the six months ended September 30, 2020.  Contract liabilities. Contract liabilities primarily relate to advance consideration received from customers for spectrum services, for which revenue is recognized over time, as the services are performed. These contract liabilities are recorded as deferred revenue on the balance sheet. The related liability as of March 31, 2020 of $3.5 million has been reduced by revenue recognized in the six months ended September 30, 2020 of $0.4 million leaving a remaining liability of $3.1 million as of September 30, 2020.

Intangible Assets

Intangible Assets	6 Months Ended
	Sep. 30, 2020
Intangible Assets [Abstract]
Intangible Assets	4. 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. There were no impairment charges related to the Company’s indefinite-lived intangible assets during the three and six months ended September 30, 2020 and 2019.  During the six months ended September 30, 2020, the Company entered into agreements with several third parties in multiple U.S. markets to acquire wireless licenses for cash consideration of $10.8 million after receiving FCC approval.  The nation’s railroads, particularly the major freight lines, operate on six narrowband 900 MHz channels licensed to their trade association, the Association of American Railroads (“AAR”). Three of these narrowband channels are located in the 900 MHz broadband segment created by the FCC in the Report and Order. As a result, in order to qualify for broadband licenses under the Report and Order, the Company will be required to provide spectrum for the relocation of the AAR channels to narrowband channels outside the 900 MHz broadband segment.  In January 2020, the Company entered into an agreement with the AAR in which it agreed to cancel licenses in the 900 MHz band to enable the AAR to relocate its operations, including operations utilizing the three channels located in the 900 MHz broadband segment (the “AAR Agreement”). The FCC referenced the AAR agreement in the Report and Order, and required the Company to cancel its licenses and return them to the FCC in accordance with the AAR Agreement. The Report and Order provides that the FCC will make the channels associated with these licenses available to the AAR to enable the AAR to relocate their current operations. The Report and Order also provides that the FCC will credit the Company for its cancelled licenses for purposes of determining the Company’s eligibility to secure broadband licenses and the calculation of any anti-windfall payments.  In accordance with the Report and Order, the Company cancelled its licenses in the three months ended June 30, 2020. Because the Company did not receive any licenses nor monetary reimbursement in exchange for the cancellation, but only credit for purposes of determining its future eligibility and payment obligations for broadband licenses under the Report and Order, the Company recorded a $4.7 million loss from disposal of the intangible assets in the Consolidated Statements of Operations for the three months ended June 30, 2020.  In August 2020, the Company closed an agreement with a third party for the exchange of 900 MHz licenses plus approximately $0.3 million for the reprogramming of their equipment. Since the licenses the Company acquired in the exchange were included in the licenses returned to the FCC in accordance with the AAR Agreement above, the $0.3 million for equipment reprogramming was recorded as additional loss from disposal of the intangible assets in the Consolidated Statements of Operations for the three and six months ended September 30, 2020 , respectively.  In September 2020, the Company closed an agreement with a third party for the exchange of 900 MHz licenses. Under the agreement, the Company received spectrum licenses at their estimated fair value of approximately $0.2 million and a payment of $1.2 million in cash to clear the channels received from incumbents. In January 2018, the Company received $0.6 million as a refundable deposit when the agreement was executed in Fiscal 2018 and the Company is entitled to receive the remaining $0.6 million upon receipt of FCC approval and closing of the agreement in September 2020. Under the agreement, the Company transferred spectrum licenses with book value of approximately $0.3 million to the third party . The Company recognized a $1. 1 million gain from disposal of intangible assets in the Consolidated Statement of Operations when the deal closed in September 2020 .  Intangible assets consist of the following at September 30 , 2020 and March 31, 2020 (in thousands):    Wireless Licenses  Balance at March 31, 2020 $ 111,526  Acquisitions 10,864  Exchanges - licenses received 196  Exchanges - licenses surrendered (262)  Cancellations (4,983)  Balance at September 30, 2020 $ 117,341

Equity Method Investment

Equity Method Investment	6 Months Ended
	Sep. 30, 2020
Equity Method Investment [Abstract]
Equity Method Investment	5. Equity Method Investment  In connection with the transfer of its TeamConnect business and support for its pdvConnect business, the Company entered into a memorandum of understanding (“MOU”) with the principals of Goosetown on December 31, 2018. Under the MOU, the Company agreed to assign the intellectual property rights to its pdvConnect application to the LLC, a new entity formed by the principals of Goosetown, in exchange for a 19.5% ownership interest in the LLC, effective April 30, 2019. The Goosetown principals have agreed to fund the future operations of the LLC, subject to certain limitations. The LLC has assumed the Company’s software support and maintenance obligations under the Goosetown and A BEEP Agreements. The LLC has also assumed customer care services related to the Company’s pdvConnect application. The Company provided transition services to the LLC through April 1, 2019 to facilitate an orderly transition of the customer care services . On April 1, 2020, the Company transferred its pdvConnect customers to the LLC, and the LLC agreed to pay the Company a certain portion of the recurring revenues from these customers. During the six months ended September 30, 2020 , the change in the carrying value of the investment in the LLC is summarized as follows (in thousands):    Equity Method Investment  Equity method investment carrying value at March 31, 2020 $ 39  Share of net loss from LLC (16)  Equity method investment carrying value at September 30, 2020 $ 23

Related Party Transactions

Related Party Transactions	6 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Related Party Transactions	6. Related Party Transactions  Under the terms of the MOU, the Company is obligated to pay the LLC a monthly service fee for a 24 -month period ending on January 7, 2021 for its assumption of the Company’s support obligations under the A BEEP and Goosetown agreements. The Company is also obligated to pay the LLC a certain portion of the billed revenue received by the Company from pdvConnect customers for a 48 -month period. For the three and six months ended September 30, 2020, the Company incurred $176,000 and $353,000 under the MOU, respec tively. For the three and six months ended September 30, 2019, the Company incurred $250,000 and $514,000 under the MOU, respectively. As of September 30, 2020 and March 31, 2020, the Company owed $1,000 and $12,000 to the LLC, respectively.  The Company did no t purchase any equipment from Motorola for the three and six months ended September 30, 2020. The Company purchased $2,000 and $11,000 of equipment from Motorola for the three and six months ended September 30, 2019. The Motorola revenue recognized for the three and six months ended September 30, 2020 and , 2019 were approximately $182,000 and $364,000 , respectively for each period. As of September 30, 2020 and March 31, 2020, the Company owed $ 112,500 and $98,000 to Motorola, respectively.  On May 5, 2020, the Company entered into a consulting agreement with Rachelle B. Chong under which Ms. Chong will serve as a Senior Advisor to the Company’s management team effective May 15, 2020. In connection with the consulting agreement, Ms. Chong submitted her resignation from the Company’s Board of Directors and as a member of the Board’s Nominating and Corporate Governance Committee. During the three and six months ended September 30, 2020, the Company incurred $36,000 and $60,000 , respectively, in consulting fees to Ms. Chong. As of September 30, 2020, the Company did no t have any outstanding liabilities to Ms. Chong.  On June 25, 2020, as part of its Executive Succession Plan, the Company announced that Brian D. McAuley had submitted his resignation as Executive Chairman of the Board, effective on July 1, 2020. On August 27, 2020, the Company entered into a consulting agreement with Mr. McAuley under which Mr. McAuley will serve as a Senior Advisor to the Company’s management team and provide strategic, corporate governance and Board advisory services. The Consulting Agreement provides that Mr. McAuley will receive cash compensation of $40,000 per year. Pursuant to the existing terms of his outstanding equity awards, Mr. McAuley will continue to vest in his outstanding equity awards as he continues to provide services to the Company pursuant to the Consulting Agreement. The Consulting Agreement is effective as of September 2, 2020 and terminates by its terms on September 1, 2021, unless terminated earlier by either party or extended upon the mutual agreement of the parties at least thirty (30) days before the end of the term. The Consulting Agreement contains standard confidentiality, indemnification and intellectual property assignment provisions in favor of the Company. The Consulting Agreement also contains a waiver by Mr. McAuley to any severance benefits that he might be entitled to receive under the Company’s Executive Severance Plan in connection with his resignation and the Executive Succession Plan. In consideration for this wavier, in the event the Company terminates the Consulting Agreement without cause, Mr. McAuley dies or becomes disabled during the term of the Consulting Agreement, or the Company elects not to extend the term of the Consulting Agreement through September 1, 2023, then the vesting of all outstanding time-based equity awards held by Mr. McAuley shall accelerate on the date his consulting services end such that he will be deemed to have vested in a total of 18,761 shares of Common Stock for his services under the Consulting Agreement. In addition, Mr. McAuley’s performance-based equity awards shall remain outstanding (and shall not terminate) and he shall continue to be eligible to obtain vested option shares and vested restricted stock units under his outstanding performance-based equity awards if the “Vesting Conditions” set forth in the performance-based equity awards are satisfied.

Impairment and Restructuring Ch

Impairment and Restructuring Charges	6 Months Ended
	Sep. 30, 2020
Impairment and Restructuring Charges [Abstract]
Impairment and Restructuring Charges	7. Impairment and Restructuring Charges  Long-lived Assets and Right of Use Assets Impairment.  During the six months ended September 30, 2020, the Company recorded a $29,000 non-cash impairment charge for long-lived assets consisting of $29,000 for network site costs to reduce the carrying values to zero . There was no impairment charge for the six months ending September 30, 2019.  Restructuring Charges.  April 2018 and June 2018 restructuring activities . In April 2018, the Company announced a shift in its focus and resources in order to pursue its regulatory initiatives at the FCC and prepare for the future deployment of broadband and other advanced technologies and services. In light of this shift in focus, the Company’s 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 new chief executive officer. In connection with the transition, the Company and Mr. Pescatore entered into a Continued Service, Consulting and Transition Agreement and a separate Consulting Agreement (the “CEO Transition Agreements”) and the Company also entered into additional consulting and transition agreements with several other key employees.  On June 1, 2018, the Company’s Board approved an initial plan to restructure its business aimed at reducing the operating costs of its TeamConnect and pdvConnect businesses and better aligning and focusing its business priorities on its spectrum initiatives. As part of the restructuring plan, the Company eliminated approximately 20 positions, or 20% of its workforce, primarily from its TeamConnect and pdvConnect businesses. In August 2018, the Company continued with its restructuring efforts and eliminated approximately seven additional positions.  For the six months ended September 30, 2020 , total accrued restructuring charges for the April 2018 and June 2018 restructuring activities were as follows (in thousands):    Restructuring Activities  Balance at March 31, 2020 $ 565  Cash payments (544)  Balance at September 30, 2020 (classified as current liabilities - restructuring reserve) $ 21   December 2018 cost reductions. On December 31, 2018, the Company’s board of directors approved the following cost reduction actions: (i) the elimination of approximately 20 positions, or 30% of the Company’s workforce and (ii) the closure of its office in San Diego, California (collectively, the “December 2018 Cost-Reduction Actions”). For the three and six months ended September 30, 2020, the Company reduced restructuring charge relating to the December 2018 Cost-Reduction Actions in the amounts of $17,000 and $3,000 , respectively, related to employee severance and benefit costs. For the three and six months ended September 30, 2019, the Company recorded an additional restructuring charge relating to the December 2018 Cost-Reduction Actions amounting to $28,000 and $172,000 , respectively, related to employee severance and benefit costs. For the six months ended September 30, 2019, the Company reduced the facility exit costs accrual for our San Diego, California office by approximately $28,000 . The Company completed the cost reduction and restructuring actions in July 31, 2019 and the related cash payments for severance costs was completed by the end of August 31, 2019.  For the six months ended September 30, 2020, total December 2018 cost reduction charges were as follows (in thousands):    Restructuring Activities  Balance at March 31, 2020 $ 71  Severance costs (3)  Cash payments —  Balance at September 30, 2020 (classified as current liabilities - restructuring reserve) $ 68  

Leases

Leases	6 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Leases	8. Leases  A lease is defined as a contract that conveys the right to control the use of identified property, plant or equipment for a period of time in exchange for consideration. On April 1, 2019, the Company adopted ASC 842 and it primarily affected the accounting treatment for operating lease agreements in which the Company is the lessee.   Substantially all of the leases in which the Company is the lessee are comprised of corporate office space and tower space. The Company is obligated under certain lease agreements for office space with lease terms expiring on various dates from October 14, 2024 through June 30, 2027, which includes a ten -year lease extension for its corporate headquarters. The Company entered into multiple lease agreements for tower space related to its TeamConnect business. The lease expiration dates range from October 31, 2020 to June 30, 2026.  Substantially all of the Company’s leases are classified as operating leases, and as such, were previously not recognized on the Company’s Consolidated Balance Sheet. With the adoption of Topic 842, operating lease agreements are required to be recognized on the Consolidated Balance Sheet as Right of Use (“ROU”) assets and corresponding lease liabilities.  ROU assets include any prepaid lease payments and exclude any lease incentives and initial direct costs incurred. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The lease terms may include options to extend or terminate the lease if it is reasonably certain that the Company will exercise that option.  Weighted-average remaining lease term and discount rate for the Company’s operating leases are as follows:    Six months ended September 30,  2020 2019  Weighted average term - operating lease liabilities 4.69 years 5.35 years  Weighted average incremental borrowing rate - operating lease liabilities 13% 13%   Rent expense amounted to approximately $0.6 million for the three months ended September 30, 2020, of which approximately $0.4 million was classified as cost of revenue and the remainder of approximately $0.2 million was classified in operating expenses in the Consolidated Statements of Operations. Rent expense amounted to approximately $1.3 million for the six months ended September 30, 2020, of which approximately $0.8 million was classified as cost of revenue and the remainder of approximately $0.5 million was classified in operating expenses in the Consolidated Statements of Operations.  Rent expense amounted to approximately $0.7 million for the three months ended September 30, 2019, of which approximately $ 0.4 million, was classified as cost of revenue and the remainder of approximately $0.3 million was classified in operating expenses in the Consolidated Statements of Operations . Rent expense amounted to approximately $1.3 million for the six months ended September 30, 2019, of which approximately $ 0.8 million, was classified as cost of revenue and the remainder of approximately $0.5 million was classified in operating expenses in the Consolidated Statements of Operations .  In June 2020, the Company terminated an operating tower space lease early resulting in a non-cash reductions in ROU assets by $19,000 , operating lease liabilities by $20,000 and gain in disposal of long-lived asset by $1,000 .  The following table presents net lease cost for the three and six months ended September 30, 2020 and 2019 (in thousands):    Three months ended September 30, Six months ended September 30,  2020 2019 2020 2019  Lease cost  Operating lease cost (cost resulting from lease payments) $ 612 $ 666 $ 1,271 $ 1,290  Short term lease cost 40 10 43 32  Sublease income (3) (5) (6) (9)  Net lease cost $ 649 $ 671 $ 1,308 $ 1,313  The following table presents supplemental cash flow and non-cash activity information for the six months ended September 30, 2020 and 2019 (in thousands):    Six months ended September 30,  2020 2019  Operating cash flow information:  Operating lease - operating cash flows (fixed payments) $ 1,411 $ 1,321  Operating lease - operating cash flows (liability reduction) $ 961 $ 661  Non-cash activity:  Right of use assets obtained in exchange for new operating lease liabilities $ 18 $ 7,915   The following table presents supplemental balance sheet information as of September 30, 2020 and March 31, 2020 (in thousands):    September 30, 2020 March 31, 2020  Non-current assets - right of use assets, net $ 5,665 $ 6,500  Current liabilities - operating lease liabilities $ 1,531 $ 1,695  Non-current liabilities - operating lease liabilities $ 6,254 $ 7,051   Future minimum payments under non-cancelable leases for office and tower spaces (exclusive of real estate tax, utilities, maintenance and other costs borne by the Company), for the remaining terms of the leases following the six months ended September 30, 2020 are as follows (in thousands):    Operating  Fiscal Year Leases  2021 (excluding the six months ended September 30, 2020) $ 1,276  2022 2,256  2023 2,105  2024 1,917  2025 1,524  After 2025 1,375  Total future minimum lease payments 10,453  Amount representing interest (2,668)  Present value of net future minimum lease payments $ 7,785

Income Taxes

Income Taxes	6 Months Ended
	Sep. 30, 2020
Income Taxes [Abstract]
Income Taxes	9. Income Taxes  On March 27, 2020, the Coronavirus Aid Relief and Economic Security (“CARES”) Act was signed into law. The Act contains several new or changed income tax provisions, including but not limited to the following: increased limitation threshold for determining deductible interest expense, class life changes to qualified improvements (in general, from 39 years to 15 years) and the ability to carry back net operating losses (“NOLs”) incurred from tax years 2018 through 2020 up to the five preceding tax years. Most of these provisions are either not applicable or have no material effect on the Company. However, the CARES Act changed the language of when NOLs converted from a 20-year life to an indefinite life. From the Tax Cuts and Jobs Act of 2017 (“TCJA”) rule, NOLs in tax periods ending after December 31, 2017 had an indefinite life. Under the new CARES Act, NOLs generated in periods beginning after December 31, 2017 are carried forward indefinitely. This dating change effectively disqualified the Company's March 31, 2018 NOL as an indefinite lived asset and source of taxable income to offset the Company's deferred tax liability stemming from indefinite-lived intangibles. The Company's NOLs generated after March 31, 2018, may continue to be used as an indefinite-lived asset to offset the deferred tax liability, but limited to 80% of future taxable income (or the balance of the deferred tax liability as of March 31, 2020). The total impact of this date change from the CARES Act increased the Company's net federal deferred tax liability from approximately $0.2 million to $1.6 million as of March 31, 2020. The state deferred tax liability of approximately $1.4 million as of March 31, 2020 is unchanged.  For the year ended March 31, 2020, the Company had federal and state NOL carryforwards of approximately $211.9 million and $112.7 million, respectively. Of these federal and state NOLs, approximately $125.3 million and $92.6 million, respectively, are expiring in various amounts from 2020 through 2040 , to offset future taxable income. The remaining federal and state NOLs of approximately $86.6 million and $20.1 million, respectively, have an indefinite life and the federal NOLs may only offset 80% of taxable income when used. For the six months ended September 30, 2020, the Company incurred federal and state net operating losses of approximately $23.2 million and $18.7 million, respectively, to offset future taxable income, of which $30.0 million can be carried forward indefinitely, but can only offset 80% of taxable income when used.  The Company used a discrete effective tax rate method to calculate taxes for the three and six months ended September 30, 2020. The Company determined that applying an estimate of the annual effective tax rate would not provide a reasonable estimate as small changes in estimated “ordinary” loss would result in significant changes in the estimated annual effective tax rate. Accordingly, for the three and six months ended September 30, 2020, the Company recorded a total deferred tax expense of $145,000 and $156,000 , respectively, due to the inability to use some portion of federal and state NOL carryforwards against the deferred tax liability created by amortization of indefinite-lived intangibles.

Stock Acquisition Rights, Stock

Stock Acquisition Rights, Stock Options and Warrants	6 Months Ended
	Sep. 30, 2020
Stock Acquisition Rights, Stock Options and Warrants [Abstract]
Stock Acquisition Rights, Stock Options and Warrants	10. Stock Acquisition Rights, Stock Options and Warrants  The Company established the 2014 Stock Plan (the “2014 Stock Plan”) to attract, retain and reward individuals who contribute to the achievement of the Company’s goals and objectives. This 2014 Stock Plan superseded previous stock plans. As of September 30, 2020, stock options to purchase 18,358 shares of common stock were outstanding and vested under such previous plans .  The Company’s Board has reserved 4,147,985 shares of common stock for issuance under its 2014 Stock Plan as of September 30, 2020, of which 838,251 shares are available for future issuance. The number of shares may increase, based on Board approval, each January 1 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. Effective January 1, 2020, the Board elected to increase the shares authorized under the 2014 Stock Plan by 342,762 shares, which represented 2% of the of the Company’s common stock issued and outstanding as of December 31, 2019. Restricted Stock and Restricted Stock Units  A summary of non-vested restricted stock activity for the six months ended September 30, 2020 is as follows:     Weighted  Average  Restricted Grant Day  Stock Fair Value  Non-vested restricted stock outstanding at March 31, 2020 352,194 $ 37.93  Granted 252,419 48.79  Forfeited — —  Vested (140,218) 39.91  Non-vested restricted stock outstanding at September 30, 2020 464,395 $ 43.23  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 $3.1 million and $4.9 million for the three and six months ended September 30 , 2020 , respectively , which included $0.8 million of expense related to the Type III modification of restricted stock units held by the Company’s former Chairman of the Board upon his transition to a consultant to the Company that is probable of vesting under the modified condition . Stock compensation expense r elated to restricted stock was approximately $1.0 million and $2.0 million for the three and six months ended September 30 , 2019 , respectively.  At September 30, 2020, there was $15.8 million of unvested compensation expense for restricted stock, which is expected to be recognized over a weighted average period of 2.8 years .  Performance Stock Units  A summary of the performance stock unit activity for the six months ended September 30, 2020 is as follows:     Weighted  Average  Performance Grant Day  Stock Fair Value  Performance stock outstanding at March 31, 2020 138,984 $ 46.85  Granted 30,049 49.92  Forfeited — —  Vested (91,216) 46.85  Performance stock outstanding at September 30, 2020 77,817 $ 48.04  On February 28, 2020, the Company awarded 95,538 performance-based restricted stock units. The performance goals are:  (A) Target Goal : 50% of the shares vest upon (i) achievement by December 31, 2020 of 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 (ii) the lack of objection by the Company’s Board 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; and  (B) Stretch Goal : The remaining 50% of the performance shares vest and settle upon the occurrence of all three of the following conditions: (i) the Company enters into one or more long-term agreement(s) with critical infrastructure or enterprise business(es) to enable such business(es) to utilize the Company’s spectrum for broadband connectivity; (ii) the combined total contract dollars payable to the Company over the initial term(s) of such agreement(s) equals or exceeds a certain amount as specified by the Board; and (iii) the agreement(s) is/are binding on such business(es) and is/are either not contingent on prior Board approval(s) or such approval(s) has/have been received. If all of these conditions have not been achieved by December 30, 2020, the performance shares will expire unvested.  Additionally, on February 28, 2020, the Company awarded 43,446 performance-based restricted stock units. The performance goal related to these units is: 100% of the shares will vest upon (i) achievement by December 31, 2020 of 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 (ii) the lack of objection by the Company’s Board 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. The goal was achieved when the Report and Order was effective in August 2020.  On June 24, 2020, the Company awarded up to 60,098 performance-based restricted units to the newly appointed President and Chief Executive Officer as part of the Succession Plan, (the “CEO Performance Units”). The performance-based restricted units will vest based on the Company’s achievement of revenue metric over a four -year measurement period from the grant date, with 30,049 units vesting if the target revenue metric is achieved and up to 60,098 vesting if the maximum revenue metric is achieved.  For the three and six months ended September 30, 2020, the Company recorded stock compensation expense amounting to approximately $4.3 million based on the achievement of the Target Goal under the performance-based restricted stock units, upon the Report and Order becoming effective in August 2020 . For the three and six months ended September 30, 2019, there was no stock compensation expense recognized for the performance-based restricted stock units. As of September 30, 2020, there was approximately $3.2 million of unvested compensation expense for the outstanding performance-based restricted stock units related to the Stretch Goal and the CEO Performance Units.  Stock Options  A summary of stock option activity for the six months ended September 30, 2020 is as follows:     Options Weighted Average Exercise Price  Options outstanding at March 31, 2020 1,807,466 $ 23.93  Options granted 60,558 49.92  Options exercised (84,704) (26.43)  Options forfeited/expired — —  Options outstanding at September 30, 2020 1,783,320 $ 24.70  On June 24, 2020 , the Company awarded a stock option to purchase 60,558 shares of common stock to its newly appointed President and Chief Executive Officer as part of the Succession Plan. The award has a contractual life of 10 years . 25% of the option shares will vest on July 1, 2021 with the remaining shares vesting in three equal annual installments, based on the President and Chief Executive Officer’s continuous service to the Company through the applicable vesting dates.  The Black-Scholes option model requires weighted average assumptions to be used for the calculation of the Company’s stock compensation expense. The assumptions used during the six months ended September 30, 2020 were: the expected life of the award was 6.07 years; the risk free interest rate was 0.43% ; the expected volatility rate was 53.41% ; the expected dividend yield was 0.0% ; and the expected forfeiture rate was 0% .  Stock compensation expense related to the amortization of the fair value of stock options issued was approximately $0.3 million and $0.5 million for the three and six months ended September 30, 2020. For the three and six months ended September 30, 2019, stock compensation expense was approximately $0.4 million and $1.0 million, respectively .  As of September 30, 2020, there was approximately $1.6 million of unrecognized compensation expense related to non-vested stock options granted under the Company’s stock option plans which is expected to be recognized over a weighted-average period of 1.3 years.  Performance Stock Options  A summary of the performance stock options as of September 30, 2020 is as follows:     Performance Options Weighted Average Exercise Price  Performance Options outstanding at March 31, 2020 82,197 $ 46.85  Performance Options granted — —  Performance Options exercised — —  Performance Options forfeited/expired — —  Performance Options outstanding at September 30, 2020 82,197 $ 46.85   On February 28, 2020, the Company awarded 67,562 performance-based stock options. The performance goals are:  (A) Target Goal : 50% of the shares vest upon (i) achievement by December 31, 2020 of 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 (ii) the lack of objection by the Company’s Board 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 and  (B) Stretch Goal : The remaining 50% of the performance shares vest and settle upon the occurrence of all three of the following conditions: (i) the Company enters into one or more long-term agreement(s) with critical infrastructure or enterprise business(es) to enable such business(es) to utilize the Company’s spectrum for broadband connectivity; (ii) the combined total contract dollars payable to the Company over the initial term(s) of such agreement(s) equals or exceeds a certain amount as specified by the Board; and (iii) the agreement(s) is/are binding on such business(es) and is/are either not contingent on prior Board of Director approval(s) or such approval(s) has/have been received. If all of these conditions have not been achieved by December 30, 2020, the performance shares will expire unvested.  Additionally, the Company awarded 14,635 performance-based stock options on February 28, 2020. The performance goal is: 100% of the shares will vest upon (i) achievement by December 31, 2020 of 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 (ii) the lack of objection by the Company’s Board 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. The goal was achieved when the Report and Order was effective in August 2020.  For the three and six months ended September 30, 2020, the Company recognized $0.8 million based on the achievement of the Target Goal under the performance-based stock options, upon the Report and Order becoming effective in August 2020. As of September 30, 2020, there was approximately $0.6 million of unvested compensation expense relating to the outstanding performance-based stock options for the Stretch Goal.  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 of these Class B Units into shares of its common stock at its election. 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 consolidated financial statements.

Contingencies

Contingencies	6 Months Ended
	Sep. 30, 2020
Contingencies [Abstract]
Contingencies	11. Contingencies  Liti gation  From time to time, the Company may be involved in litigation that arises from the ordinary operations of the business, such as contractual or employment disputes or other general actions. The Company is not involved in any material legal proceedings at this time.  COVID-19 Pandemic  In March 2020, the World Health Organization declared the outbreak of a novel coronavirus (“COVID-19”) as a pandemic and COVID-19 continues to cause significant disruptions throughout the United States. The ultimate extent of the impact of COVID-19 on the financial performance of the Company and its ability to secure broadband licenses pursuant to the terms of the 900 MHz Report and Order and to commercialize any broadband licenses it secures, will depend on future developments, including the duration and spread of COVID-19, the laws, orders and restrictions imposed by federal, state and local governmental agencies, the impact of COVID-19 on the Company’s targeted utility and critical infrastructure customers, and the overall economy, all of which are highly uncertain and cannot be predicted. If the financial markets and/or the overall economy are impacted for an extended period, the Company's operating results may be materially and adversely affected. The Company is actively managing the business to maintain its cash flow and believes that it has adequate liquidity through at least the next twelve months.

Concentrations of Credit Risk

Concentrations of Credit Risk	6 Months Ended
	Sep. 30, 2020
Concentrations of Credit Risk [Abstract]
Concentrations of Credit Risk	12. Concentrations of Credit Risk  Financial instruments that potentially expose the Company to concentrations of credit risk consist primarily of cash and cash equivalents and trade accounts receivable.  The Company places its cash and temporary cash investments with financial institutions for which credit loss is not anticipated.  As of September 30, 2020 , the Company sells its pdvConnect product and extends credit predominately to one Tier 1 domestic carrier . The Company maintains allowances for doubtful accounts based on factors surrounding the write-off history, historical trends, and other information.

Business Concentrations

Business Concentrations	6 Months Ended
	Sep. 30, 2020
Business Concentrations [Abstract]
Business Concentrations	13. Business Concentrations  For the three and six months ended September 30, 2020, the Company had one Tier 1 domestic carrier and one reseller that accounted for approximately 21% of total operating revenues, respectively. For the three and six months ended September 30, 2019, the Company had two domestic carriers that accounted for approximately 23% and 25% of operating revenues, respectively.  As of September 30, 2020, the Company had one Tier 1 domestic carrier and one reseller that accounted for approximately 93% of total accounts receivable. As of March 31, 2020, the Company had one domestic carrier and one reseller that accounted for approximately 71% of total accounts receivable . 

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Sep. 30, 2020
Summary of Significant Accounting Policies [Abstract]
Basis of Presentation and Use of Estimates	Basis of Presentation and Use of Estimates  The unaudited consolidated financial statements and accompanying notes are prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information. Pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”), certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted.  Because certain information and footnote disclosures have been condensed or omitted, these unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2020, as filed on May 28, 2020 with the SEC. In the Company’s opinion all normal and recurring adjustments considered necessary for a fair presentation of the financial position, results of operations and cash flows for the periods presented have been included. The Company believes that the disclosures made in the unaudited consolidated interim financial statements are adequate to make the information not misleading. The results of operations for the interim periods presented are not necessarily indicative of the results for the year. 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. New estimates in the period relate to determining the Company’s estimated incremental borrowing rate in recognizing right of use assets and operating lease liabilities. 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	 Reclassifications  Certain prior year amounts have been reclassified to conform to the presentation of the corresponding amounts in the financial statements for the three and six months ended September 30, 2020. These reclassifications had no effect on previously reported net loss or net loss per common share basic and diluted. 
Intangible Assets	 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. On May 13, 2020, the FCC approved the Report and Order to modernize and realign the 900 MHz band to increase its usability and capacity by allowing it to be utilized for the deployment of broadband networks, technologies and solutions. The Report and Order was published in the Federal Register on July 16, 2020 and became effective on August 17, 2020. The Company is now engaged in qualifying for and securing broadband licenses from the FCC, with a focus on pursuing licenses in those counties in which it believes it has near-term commercial opportunities. 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 annually on an aggregate basis, as the Company will be utilizing the wireless licenses on an integrated basis as part of developing broadband. In the year ended March 31, 2020, (“Fiscal 2020”), the Company performed a step zero qualitative approach to test indefinite-lived intangible assets for impairment by first assessing qualitative factors to determine whether it is more-likely-than-not that the fair value of an indefinite-lived intangible asset is impaired as a basis for determining whether it is necessary to perform quantitative impairment testing. There are no triggering events indicating impairment in the three and six months ended September 30, 2020.  See Note 4 “Intangible Assets” for a discussion of the Company’s (gain)/ loss from the disposal of intangible assets incurred during the period ended September 30, 2020. 
Long-Lived Asset and Right of Use Asset Impairment	Long-Lived Asset and Right of Use Asset Impairment  The Company evaluates long-lived assets, including right of use 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 the asset groups are 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. During the six months ended September 30, 2020, the Company recorded a $29,000 non-cash impairment charge for long-lived assets consisting of $29,000 for network site costs to reduce the carrying values to zero . There was no impairment charge for the three months ended September 30, 2020 and three and six months ended September 30, 2019.
Net Loss Per Share of Common Stock	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, stock options, restricted stock and warrants are considered to be potentially dilutive securities. Because the Company has reported a net loss for the three and six months ended September 30, 2020 and 2019, respectively, 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 1,540,000 and 1,409,000 at September 30, 2020 and 2019, 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	Recently Issued Accounting Pronouncements  In June 2016, the FASB issued ASC 326, Financial Instruments - Credit Losses and has subsequently modified several areas of the standard in order to provide additional clarity and improvements. The new standard requires entities to use a Current Expected Credit Loss impairment model based on expected losses rather than incurred losses. Under this model, an entity would recognize an impairment allowance equal to its current estimate of all contractual cash flows that the entity does not expect to collect from financial assets measured at amortized cost within the scope of the standard. The entity's estimate would consider relevant information about past events, current conditions and reasonable and supportable forecasts, which will result in recognition of lifetime expected credit losses. As a smaller reporting company, the standard will be effective for the Company's fiscal year beginning April 2023, including interim reporting periods within that fiscal year, although early adoption is permitted. The Company is evaluating the potential impact that ASC 326 and subsequent modifications may have on its consolidated financial statements.  Other accounting standards that have been issued or proposed by the FASB or other standard-setting bodies that do not require adoption until a future date are not expected to have a material impact on the Company’s consolidated financial statements upon adoption.

Intangible Assets (Tables)

Intangible Assets (Tables)	6 Months Ended
	Sep. 30, 2020
Intangible Assets [Abstract]
Schedule of Indefinite-Lived Intangible Assets	  Wireless Licenses  Balance at March 31, 2020 $ 111,526  Acquisitions 10,864  Exchanges - licenses received 196  Exchanges - licenses surrendered (262)  Cancellations (4,983)  Balance at September 30, 2020 $ 117,341 

Equity Method Investment (Table

Equity Method Investment (Tables)	6 Months Ended
	Sep. 30, 2020
Equity Method Investment [Abstract]
Equity Method Investment	  Equity Method Investment  Equity method investment carrying value at March 31, 2020 $ 39  Share of net loss from LLC (16)  Equity method investment carrying value at September 30, 2020 $ 23 

Impairment and Restructuring _2

Impairment and Restructuring Charges (Tables)	6 Months Ended
	Sep. 30, 2020
April 2018 And June 2018 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Schedule of Accrued Restructuring Charges	  Restructuring Activities  Balance at March 31, 2020 $ 565  Cash payments (544)  Balance at September 30, 2020 (classified as current liabilities - restructuring reserve) $ 21  
December 2018 Cost Reductions [Member]
Restructuring Cost and Reserve [Line Items]
Schedule of Accrued Restructuring Charges	  Restructuring Activities  Balance at March 31, 2020 $ 71  Severance costs (3)  Cash payments —  Balance at September 30, 2020 (classified as current liabilities - restructuring reserve) $ 68  

Leases (Tables)

Leases (Tables)	6 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Additional Lease Cost Information	  Six months ended September 30,  2020 2019  Weighted average term - operating lease liabilities 4.69 years 5.35 years  Weighted average incremental borrowing rate - operating lease liabilities 13% 13%  
Lease Cost	  Three months ended September 30, Six months ended September 30,  2020 2019 2020 2019  Lease cost  Operating lease cost (cost resulting from lease payments) $ 612 $ 666 $ 1,271 $ 1,290  Short term lease cost 40 10 43 32  Sublease income (3) (5) (6) (9)  Net lease cost $ 649 $ 671 $ 1,308 $ 1,313 
Supplemental Lease Information	The following table presents supplemental cash flow and non-cash activity information for the six months ended September 30, 2020 and 2019 (in thousands):    Six months ended September 30,  2020 2019  Operating cash flow information:  Operating lease - operating cash flows (fixed payments) $ 1,411 $ 1,321  Operating lease - operating cash flows (liability reduction) $ 961 $ 661  Non-cash activity:  Right of use assets obtained in exchange for new operating lease liabilities $ 18 $ 7,915   The following table presents supplemental balance sheet information as of September 30, 2020 and March 31, 2020 (in thousands):    September 30, 2020 March 31, 2020  Non-current assets - right of use assets, net $ 5,665 $ 6,500  Current liabilities - operating lease liabilities $ 1,531 $ 1,695  Non-current liabilities - operating lease liabilities $ 6,254 $ 7,051  
Future Minimum Payments	  Operating  Fiscal Year Leases  2021 (excluding the six months ended September 30, 2020) $ 1,276  2022 2,256  2023 2,105  2024 1,917  2025 1,524  After 2025 1,375  Total future minimum lease payments 10,453  Amount representing interest (2,668)  Present value of net future minimum lease payments $ 7,785 

Stock Acquisition Rights, Sto_2

Stock Acquisition Rights, Stock Options and Warrants (Tables)	6 Months Ended
	Sep. 30, 2020
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, 2020 352,194 $ 37.93  Granted 252,419 48.79  Forfeited — —  Vested (140,218) 39.91  Non-vested restricted stock outstanding at September 30, 2020 464,395 $ 43.23 
Summary of Performance Stock Activity	   Weighted  Average  Performance Grant Day  Stock Fair Value  Performance stock outstanding at March 31, 2020 138,984 $ 46.85  Granted 30,049 49.92  Forfeited — —  Vested (91,216) 46.85  Performance stock outstanding at September 30, 2020 77,817 $ 48.04 
Summary of Stock Option Activity	   Options Weighted Average Exercise Price  Options outstanding at March 31, 2020 1,807,466 $ 23.93  Options granted 60,558 49.92  Options exercised (84,704) (26.43)  Options forfeited/expired — —  Options outstanding at September 30, 2020 1,783,320 $ 24.70 
Summary of Performance Stock Options	   Performance Options Weighted Average Exercise Price  Performance Options outstanding at March 31, 2020 82,197 $ 46.85  Performance Options granted — —  Performance Options exercised — —  Performance Options forfeited/expired — —  Performance Options outstanding at September 30, 2020 82,197 $ 46.85  

Nature of Operations (Details)

Nature of Operations (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jul. 31, 2019USD ($)$ / sharesshares	Sep. 30, 2019USD ($)	Sep. 30, 2020item	Sep. 30, 2019USD ($)	Sep. 15, 2014$ / shares
Conversion of Stock [Line Items]
Sale of stock | shares	2,222,223
Sale of stock, price per share | $ / shares	$ 45
Issuance of stock during July 2019 follow-on offering, net of closing costs	$ 94,200	$ 94,244		$ 94,244
Underwriting discounts	5,500
Offering expenses	$ 300
Net proceeds from July 2019 follow-on offering				$ 94,244
TeamConnect LLC [Member]
Conversion of Stock [Line Items]
Metropolitan market areas | item			7
PDV Spectrum Holding Company, LLC [Member] | Common Class B Units [Member]
Conversion of Stock [Line Items]
Sale of stock, price per share | $ / shares					$ 20

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Summary Of Significant Accounting Policies [Line Items]
Impairment of long-lived assets	$ 0	$ 0	$ 29,000	$ 0
Property and equipment, net	4,755,000		$ 4,755,000		$ 7,000,000
Wireless licenses term			10 years
Potentially dilutive securities outstanding but excluded from computation of earnings per share			1,540,000	1,409,000
Property, Plant and Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment of long-lived assets			$ 29,000
Property and equipment, net	$ 0		$ 0

Revenue (Details)

Revenue (Details) - USD ($)	3 Months Ended		6 Months Ended		18 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Mar. 31, 2020	Jan. 31, 2018	Sep. 30, 2014
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue recognized			$ 400,000
Contract liability	$ 3,100,000		$ 3,100,000		$ 3,100,000	$ 3,500,000	$ 600,000
Cost of Revenue [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract and contract acquisition costs				$ 178,000
Sales [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract and contract acquisition costs				$ 258,000
Spectrum [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue recognized	$ 182,000	$ 182,000			$ 364,000
Contract liability								$ 7,500,000
Contractual term	10 years		10 years		10 years
TeamConnect LLC [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Service fee term			24 months
Goosetown And A BEEP [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Service transition period			2 years
Recurring revenue term			2 years
Service fee term			2 years
Purchased Customers [Member] | Maximum [Member] | Goosetown And A BEEP [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Recurring revenue	100.00%		100.00%		100.00%
Purchased Customers [Member] | Minimum [Member] | Goosetown And A BEEP [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Recurring revenue	20.00%		20.00%		20.00%
Diga-Talk Plus [Member] | A BEEP [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Service fee term			2 years
Diga-Talk Plus [Member] | Goosetown [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Recurring revenue	20.00%		20.00%		20.00%
Recurring revenue term			2 years
Diga-Talk Plus [Member] | Maximum [Member] | A BEEP [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Recurring revenue	35.00%		35.00%		35.00%
Diga-Talk Plus [Member] | Minimum [Member] | A BEEP [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Recurring revenue	15.00%		15.00%		15.00%

Intangible Assets (Narrative) (

Intangible Assets (Narrative) (Details) - USD ($)	1 Months Ended		3 Months Ended			6 Months Ended		18 Months Ended
	Sep. 30, 2020	Aug. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Mar. 31, 2020	Jan. 31, 2018
Acquired Indefinite-lived Intangible Assets [Line Items]
impairment charges								$ 0
Acquisitions						$ 10,800,000
(Gain)/loss from disposal of intangible assets, net			$ 829,000			(3,849,000)
Loss form disposal				$ (4,700,000)
Operating revenues			248,000		$ 423,000	504,000	$ 876,000
Book value	$ 117,341,000		117,341,000			117,341,000		117,341,000	$ 111,526,000
Contract liability	3,100,000		3,100,000			3,100,000		3,100,000	3,500,000	$ 600,000
Wireless Licenses [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Acquisitions						10,864,000
Book value	117,341,000		117,341,000			117,341,000		117,341,000	$ 111,526,000
Spectrum Licenses [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
(Gain)/loss from disposal of intangible assets, net	1,100,000
Estimated fair value	200,000		200,000			200,000		200,000
Book value	300,000		$ 300,000			$ 300,000		$ 300,000
Payment	$ 1,200,000
Reprogramming [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
(Gain)/loss from disposal of intangible assets, net		$ 300,000

Intangible Assets (Schedule of

Intangible Assets (Schedule of Indefinite-Lived Intangible Assets) (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2020USD ($)
Indefinite-lived Intangible Assets [Line Items]
Balance	$ 111,526
Acquisitions	10,800
Balance	117,341
Wireless Licenses [Member]
Indefinite-lived Intangible Assets [Line Items]
Balance	111,526
Acquisitions	10,864
Exchanges - licenses received	196
Exchanges - licenses surrendered	(262)
Cancellations	(4,983)
Balance	$ 117,341

Equity Method Investment (Narra

Equity Method Investment (Narrative) (Details)	Sep. 30, 2020
TeamConnect LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	19.50%

Equity Method Investment (Equit

Equity Method Investment (Equity Method Investment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]
Equity method investment carrying value			$ 39
Share of net loss from LLC	$ (12)	$ 15	(16)	$ 15
Equity method investment carrying value	23		23
TeamConnect LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment carrying value			39
Share of net loss from LLC			(16)
Equity method investment carrying value	$ 23		$ 23

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	3 Months Ended		6 Months Ended		18 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Mar. 31, 2020	Jan. 31, 2018	Sep. 30, 2014
Related Party Transaction [Line Items]
Consulting fees	$ 8,618,000	$ 1,412,000	$ 10,573,000	$ 2,989,000
Contract liability	3,100,000		3,100,000		$ 3,100,000	$ 3,500,000	$ 600,000
Revenue recognized			400,000
Rachelle B. Chong [Member]
Related Party Transaction [Line Items]
Consulting fees	36,000		60,000
Payable to related parties	0		0		0
Brian D. McAuley [Member]
Related Party Transaction [Line Items]
Consulting fees			$ 40,000
Shares issued for services			18,761
Motorola [Member]
Related Party Transaction [Line Items]
Purchase of equipment	0	2,000	$ 0	11,000
Revenue recognized	182,000	182,000	364,000	364,000
Equipment Supplier [Member]
Related Party Transaction [Line Items]
Payable to related parties	112,500		$ 112,500		112,500	98,000
Spectrum [Member]
Related Party Transaction [Line Items]
Contract liability								$ 7,500,000
Revenue recognized	182,000	182,000			364,000
TeamConnect LLC [Member]
Related Party Transaction [Line Items]
Service fee term			24 months
TeamConnect LLC [Member] | PDVConnect [Member]
Related Party Transaction [Line Items]
Contract liability	1,000		$ 1,000		$ 1,000	$ 12,000
Recurring revenue term			48 months
Goosetown And A BEEP [Member]
Related Party Transaction [Line Items]
Service fee term			2 years
Recurring revenue term			2 years
Goosetown And A BEEP [Member] | PDVConnect [Member]
Related Party Transaction [Line Items]
Revenue recognized	$ 176,000	$ 250,000	$ 353,000	$ 514,000

Impairment and Restructuring _3

Impairment and Restructuring Charges (Narrative) (Details)	Dec. 31, 2018employee	Jun. 01, 2018employee	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Mar. 31, 2020USD ($)
Restructuring Cost and Reserve [Line Items]
Impairment of long-lived assets			$ 0	$ 0	$ 29,000	$ 0
Property and equipment, net			4,755,000		4,755,000		$ 7,000,000
April 2018 And June 2018 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Positions eliminated | employee		20
Percentage of positions eliminated		20.00%
December 2018 Cost Reductions [Member]
Restructuring Cost and Reserve [Line Items]
Positions eliminated | employee	20
Percentage of positions eliminated	30.00%
Severance costs			(17,000)	$ 28,000	(3,000)	172,000
Facility exit						$ 28,000
Property, Plant and Equipment [Member]
Restructuring Cost and Reserve [Line Items]
Impairment of long-lived assets					29,000
Property and equipment, net			$ 0		$ 0

Impairment and Restructuring _4

Impairment and Restructuring Charges (Schedule of Accrued Restructuring Charges) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
April 2018 And June 2018 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Balance			$ 565
Cash payments			(544)
Balance	$ 21		21
December 2018 Cost Reductions [Member]
Restructuring Reserve [Roll Forward]
Balance			71
Severance costs	(17)	$ 28	(3)	$ 172
Balance	$ 68		$ 68

Leases (Narrative) (Details)

Leases (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lease [Line Items]
Lease extension		10 years		10 years
Lease rent expense		$ 600	$ 700	$ 1,300	$ 1,300
Decrease in ROU	$ 19
Decrease in liability	20
Gain on disposal	$ 1	5	(61)	6	(62)
Cost of Revenue [Member]
Lease [Line Items]
Lease rent expense		400	400	800	800
Operating Expense [Member]
Lease [Line Items]
Lease rent expense		$ 200	$ 300	$ 500	$ 500

Leases (Additional Lease Cost I

Leases (Additional Lease Cost Information) (Details)	Sep. 30, 2020	Sep. 30, 2019
Lease, Cost [Abstract]
Weighted average term - operating lease liabilities	4 years 9 months 29 days	5 years 6 months 11 days
Weighted average incremental borrowing rate – operating lease liabilities	13.00%	13.00%

Leases (Lease Cost) (Details)

Leases (Lease Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lease, Cost [Abstract]
Operating lease cost (cost resulting from lease payments)	$ 612	$ 666	$ 1,271	$ 1,290
Short term lease cost	40	10	43	32
Sublease income	(3)	(5)	(6)	(9)
Net lease cost	$ 649	$ 671	$ 1,308	$ 1,313

Leases (Supplemental Lease Info

Leases (Supplemental Lease Information) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Leases [Abstract]
Operating lease - operating cash flows (fixed payments)	$ 1,411	$ 1,321
Operating lease - operating cash flows (liability reduction)	961	661
Right of use assets obtained in exchange for new operating lease liabilities	18	7,915
Non-current assets - right of use assets, net	5,665	6,500	$ 6,500
Current liabilities - operating lease liabilities	1,531	1,695	1,695
Non-current liabilities - operating lease liabilities	$ 6,254	$ 7,051	$ 7,051

Leases (Future Minimum Payments

Leases (Future Minimum Payments) (Details) $ in Thousands	Sep. 30, 2020USD ($)
Leases [Abstract]
2021 (excluding the six months ended September 30, 2020)	$ 1,276
2022	2,256
2023	2,105
2024	1,917
2025	1,524
After 2025	1,375
Total future minimum lease payments	10,453
Amount representing interest	(2,668)
Present value of net future minimum lease payments	$ 7,785

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Mar. 31, 2020
Income Tax Disclosure [Line Items]
Net NOL carryforwards	$ 18,700	$ 18,700
Net operating loss carryforwards, no expiration	30,000	30,000
Tax expense/benefit	145	156
Internal Revenue Service (IRS) [Member]
Income Tax Disclosure [Line Items]
Deferred tax liabilitiy	1,600	1,600	$ 200
Net NOL carryforwards	$ 23,200	$ 23,200	211,900
Net operating loss carryforwards, no expiration			86,600
Net operating loss carryforwards			125,300
State [Member]
Income Tax Disclosure [Line Items]
Deferred tax liabilitiy			1,400
Net NOL carryforwards			112,700
Net operating loss carryforwards, no expiration			20,100
Net operating loss carryforwards			$ 92,600
Minimum [Member] | Federal and State [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, expiration year		Jan. 1, 2020
Maximum [Member] | Federal and State [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards, expiration year		Dec. 31, 2040

Stock Acquisition Rights, Sto_3

Stock Acquisition Rights, Stock Options and Warrants (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	Jun. 24, 2020	Feb. 28, 2020	Sep. 15, 2014	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Mar. 31, 2020	Jul. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of stock, price per share										$ 45
Subsidiary equity units for which investor has right to convert to common stock				500,000		500,000
2014 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding				18,358		18,358
Common stock authorized and reserved for issuance				4,147,985		4,147,985
Shares available				838,251		838,251
Additional common stock authorized and reserved for future issuance						342,762
Percentage of increase in number of shares of common stock issued and outstanding						5.00%		2.00%
Common Class B Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion ratio						one
Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of units owned				100.00%		100.00%
PDV Spectrum Holding Company, LLC [Member] | Common Class B Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from investment, shares			500,000
Sale of stock, price per share			$ 20
Stock issued during period value to purchase of assets			$ 10
First Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting for stock granted to employees	25.00%
Performance-Based Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding				82,197		82,197			82,197
Stock compensation expense				$ 0.8		$ 0.8
Unvested compensation expense				$ 0.6		$ 0.6
Options, Granted		67,562
Performance-Based Stock Options [Member] | Additional [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Granted		14,635
Performance-Based Stock Options [Member] | First Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting for stock granted to employees		50.00%
Performance-Based Stock Options [Member] | First Anniversary [Member] | Additional [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting for stock granted to employees		100.00%
Performance-Based Stock Options [Member] | Second Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting for stock granted to employees		50.00%
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding				1,783,320		1,783,320			1,807,466
Stock compensation expense				$ 0.3	$ 0.4	$ 0.5	$ 1
Unvested compensation expense				1.6		$ 1.6
Weighted average period of recognition of unrecognized compensation cost						1 year 3 months 18 days
Vesting term	10 years
Options, Granted	60,558					60,558
Expected term						6 years 26 days
Risk-free interest rate						0.43%
Volatility						53.41%
Dividend yield						0.00%
Forfeiture rate						0.00%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense				3.1	$ 1	$ 4.9	$ 2
Unvested compensation expense				15.8		$ 15.8
Weighted average period of recognition of unrecognized compensation cost						2 years 9 months 18 days
Restricted Stock [Member] | Type III [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense						$ 0.8
Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense				4.3		4.3
Unvested compensation expense				$ 3.2		$ 3.2
Vesting term	4 years
Stock issued during period	60,098	95,538
Vesting, revenue metric	30,049
Performance-Based Restricted Stock Units [Member] | Additional [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period		43,446
Performance-Based Restricted Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting, revenue metric	60,098
Performance-Based Restricted Stock Units [Member] | First Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting for stock granted to employees						50.00%
Performance-Based Restricted Stock Units [Member] | First Anniversary [Member] | Additional [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting for stock granted to employees		100.00%
Performance-Based Restricted Stock Units [Member] | Second Anniversary [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vesting for stock granted to employees						50.00%

Stock Acquisition Rights, Sto_4

Stock Acquisition Rights, Stock Options and Warrants (Summary of Restricted Stock and Restricted Stock Units Activity) (Details) - Restricted Stock [Member]	6 Months Ended
	Sep. 30, 2020$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Outstanding | shares	352,194
Stock, Granted | shares	252,419
Stock, Vested | shares	(140,218)
Stock Outstanding | shares	464,395
Weighted Average Grant Date Fair Value, Stock Outstanding | $ / shares	$ 37.93
Weighted Average Grant Date Fair Value, Stock, Granted | $ / shares	48.79
Weighted Average Grant Date Fair Value, Stock, Vested | $ / shares	39.91
Weighted Average Grant Date Fair Value, Stock Outstanding | $ / shares	$ 43.23

Stock Acquisition Rights, Sto_5

Stock Acquisition Rights, Stock Options and Warrants (Summary of Performance Stock Activity) (Details) - Performance-Based Restricted Stock Units [Member]	6 Months Ended
	Sep. 30, 2020$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Outstanding | shares	138,984
Stock, Granted | shares	30,049
Stock, Forfeited | shares
Stock, Vested | shares	(91,216)
Stock Outstanding | shares	77,817
Weighted Average Grant Date Fair Value, Stock Outstanding | $ / shares	$ 46.85
Weighted Average Grant Date Fair Value, Stock, Granted | $ / shares	49.92
Weighted Average Grant Date Fair Value, Stock, Forfeited | $ / shares
Weighted Average Grant Date Fair Value, Stock, Vested | $ / shares	46.85
Weighted Average Grant Date Fair Value, Stock Outstanding | $ / shares	$ 48.04

Stock Acquisition Rights, Sto_6

Stock Acquisition Rights, Stock Options and Warrants (Summary of Stock Option Activity) (Details) - Stock Option [Member] - $ / shares	Jun. 24, 2020	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding		1,807,466
Options, Granted	60,558	60,558
Options, Exercised		(84,704)
Options Outstanding		1,783,320
Weighted Average Exercise Price, Options outstanding		$ 23.93
Weighted Average Exercise Price, Granted		49.92
Weighted Average Exercise Price, Exercised		(26.43)
Weighted Average Exercise Price, forfeited/expired
Weighted Average Exercise Price, Options outstanding		$ 24.70

Stock Acquisition Rights, Sto_7

Stock Acquisition Rights, Stock Options and Warrants (Summary of Performance Stock Options) (Details) - Performance-Based Stock Options [Member] - $ / shares	Feb. 28, 2020	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding		82,197
Options, Granted	67,562
Options, Exercised
Options, Forfeited/Expired
Options Outstanding		82,197
Weighted Average Exercise Price, Options outstanding		$ 46.85
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, forfeited/expired
Weighted Average Exercise Price, Options outstanding		$ 46.85

Concentrations of Credit Risk (

Concentrations of Credit Risk (Details)	6 Months Ended
	Sep. 30, 2020item
Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Number of carriers	1

Business Concentrations (Detail

Business Concentrations (Details) - item	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of carriers		2		2
Concentration risk, percentage	21.00%		21.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			93.00%		71.00%
Tier 1 Carrier Partner [Member] | Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of carriers	1		1
Tier 1 Carrier Partner [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Number of carriers			1
Tier 1 Carrier Partner [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of carriers					1
Carriers One [Member] | Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		23.00%
Carriers Two [Member] | Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage				25.00%