Related Party Transactions	12 Months Ended
Related Party Transactions	Mar. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Under the terms of the MOU, the Company was 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 years ended March 31, 2022, 2021 and 2020, the Company incurred payments of $60,000, $576,000 and $974,000 under the MOU, respectively. As of March 31, 2022, the Company did not have outstanding liabilities to the related parties associated with the services transfer. As of March 31, 2021, the Company owed $32,000 to the LLC. The Company did not purchase any equipment from Motorola for the years ended March 31, 2022 and 2021. The Company purchased $11,000 of equipment from Motorola for the year ended March 31, 2020. The Company recognized approximately $729,000 each year in Spectrum revenue for the years ended March 31, 2022, 2021 and 2020. As of March 31, 2022 and 2021, the Company owed $120,000 to Motorola, unrelated to the 2014 Motorola spectrum agreement. 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 Board and as a member of the Board’s Nominating and Corporate Governance Committee. For the years ended March 31, 2022 and 2021, the Company incurred $144,000 and $132,000, respectively, in consulting fees to Ms. Chong. As of March 31, 2022 and 2021, the Company did not have any outstanding liabilities to Ms. Chong. On June 25, 2020, as part of its Executive Succession Plan (the “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 (the “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 was effective as of September 2, 2020, with an original expiration date of September 1, 2021. The Company extended the agreement by an additional twelve (12) months with a new termination date of September 1, 2022, 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 waiver, 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. For the years ended March 31, 2022 and 2021, the Company incurred approximately $40,000 and $23,000, respectively, in consulting fees to Mr. McAuley. As of March 31, 2022 and 2021, the Company did not have any outstanding liabilities to Mr. McAuley.