Nature of Operations and Basis of Presentation (Policies)	9 Months Ended
Dec. 31, 2021
Nature of Operation and Basis of Presentation [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, 2021, filed with the SEC on June 15, 2021 (the “2021 Annual Report”). 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 and assumptions that affect the report amounts. These 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.
Retirement of common stock	Retirement of common stock From time to time, the Company may acquire its common stock through share repurchases or option exercise swaps and return these shares to authorized and unissued. If the Company elects to retire these shares, the Company’s policy is to allocate a portion of the repurchase price to par value of common stock with the excess over par value allocated to accumulated deficit.
Correction of Immaterial Errors	Correction of Immaterial Errors Stock-based compensation In connection with preparing its financial statements for the year ended March 31, 2021, the Company determined that it incorrectly presented stock-based compensation in its Consolidated Statement of Operations for the three and nine months ended December 31, 2020. The Company previously reported stock compensation expense as a separate line item in the Consolidated Statement of Operations. Stock compensation expense should have been included in the same income statement line or lines as the cash compensation paid to the individuals receiving the stock-based awards such as general and administrative costs, product development and sales and support. The following table is a comparison of the reported results of operations for the three and nine months ended December 31, 2020, as a result of the correction of immaterial errors (in thousands): For the Three months ended December 31, 2020 As Originally Reported Impact of Prior Period Errors As RevisedConsolidated Statement of Operations General and administrative* $6,344 $2,462 $8,806Product development 1,098 146 1,244Sales and support 612 64 676Stock compensation expense 2,672 (2,672) — For the Nine months ended December 31, 2020 As Originally Reported Impact of Prior Period Errors As Revised General and administrative* $17,685 $12,641 $30,326Product development 2,595 438 3,033Sales and support 1,904 166 2,070Stock compensation expense 13,245 (13,245) — * General and administrative expense includes the reclassification of restructuring costs. Refer to Reclassifications below for further details. Depreciation, disposals and impairments In connection with preparing its financial statements for the quarter ended December 31, 2021, the Company determined that it understated depreciation and overstated loss on disposal of long-lived assets in its Consolidated Statement of Operations for the nine months ended December 31, 2021. In March 2021, the Company classified idled assets as Held for Future Use and suspended the depreciation for these assets. The depreciation should have been recognized evenly over the life of the asset without regard to whether the assets have been placed in service or is in use. Additionally, the Company reported disposals of assets that were in-use and misclassified certain disposals as impairments in the Consolidated Statement of Operations for the nine months ended December 31, 2021. The following table is a comparison of the results of operations for the nine months ended December 31, 2021, as a result of the correction of immaterial errors (in thousands): For the Nine months ended December 31, 2021 Impact of Prior Period ErrorsConsolidated Statement of Operations Depreciation and amortization $ 138Impairment of long-lived assets (127)Loss/(gain) from disposal of long-lived assets 35Net loss 46Net loss per common share basic and diluted — Share retirement In connection with preparing its financial statements for the quarter ended December 31, 2021, the Company determined that it incorrectly presented additional paid-in capital and accumulated deficit in its Consolidated Balance Sheets and Consolidated Statement of Stockholders’ Equity for the period ended June 30, 2021. The Company previously reported the retirement of shares from a May 2021 option exercise as a reduction to additional paid-in capital. The retirement of shares should have been reported as an increase to accumulated deficit. This transaction was presented in the stock option exercises line within the Consolidated Statement of Stockholders’ Equity. However, the Company should have reported this transaction in a separate line, retirement of common stock, along with the retirement of shares from the Company’s share repurchase program (refer to Note 7 Stockholders’ Equity for further discussion on the Company’s share repurchase program). Additionally, as a result of this error, the Company incorrectly omitted the shares surrendered from stock option exercises non-cash disclosure. The following table is a comparison of the reported financial position, changes to stockholders’ equity and cash flows as of December 31, 2021, as a result of the correction of immaterial errors (in thousands): For the period ended December 31, 2021 Impact of Prior Period ErrorsConsolidated Balance Sheets Additional paid-in capital $ 1,000Accumulated deficit (1,000) For the period ended December 31, 2021 Impact of Prior Period Errors Number of Shares Common Stock Additional paid-in capital Accumulated deficitConsolidated Statement of Stockholders’ Equity Stock option exercises 20 $ 1,000 $ —Retirement of common stock (20) — (1,000) Reclassifications Certain amounts previously reported in the Company’s Consolidated Statement of Operations for prior periods have been reclassified to conform to the presentation within this Quarterly Report on Form 10-Q. The reclassification includes the consolidation of the restructuring costs line into the general and administrative line within the Company’s Consolidated Statement of Operations.
Recently Issued Accounting Pronouncements	Recently Adopted Accounting Guidance In December 2019, the Financial Accounting Standard Board (“FASB”) issued Accounting Standard Updated (“ASU”) 2019-12, Simplifying the Accounting for Income Taxes (“ASU 2019-12”), which simplifies the accounting for income taxes by removing certain exceptions and improving the application of existing guidance. The new guidance is effective for annual and interim periods beginning after December 15, 2020. The adoption of ASU 2019-12 on April 1, 2021 did not have a material effect on the Company’s consolidated financial statements. Recently Issued Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments, and has subsequently modified several areas of Accounting Standards Codification 326, Financial Instruments – Credit Losses (“ASC 326”), 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 updates 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.

Nature of Operations and Basis of Presentation (Policies)

9 Months Ended

Dec. 31, 2021

Nature of Operation and Basis of Presentation [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, 2021, filed with the SEC on June 15, 2021 (the “2021 Annual Report”). 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 and assumptions that affect the report amounts. These 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.

Retirement of common stock

Retirement of common stock From time to time, the Company may acquire its common stock through share repurchases or option exercise swaps and return these shares to authorized and unissued. If the Company elects to retire these shares, the Company’s policy is to allocate a portion of the repurchase price to par value of common stock with the excess over par value allocated to accumulated deficit.

Correction of Immaterial Errors

Correction of Immaterial Errors Stock-based compensation In connection with preparing its financial statements for the year ended March 31, 2021, the Company determined that it incorrectly presented stock-based compensation in its Consolidated Statement of Operations for the three and nine months ended December 31, 2020. The Company previously reported stock compensation expense as a separate line item in the Consolidated Statement of Operations. Stock compensation expense should have been included in the same income statement line or lines as the cash compensation paid to the individuals receiving the stock-based awards such as general and administrative costs, product development and sales and support. The following table is a comparison of the reported results of operations for the three and nine months ended December 31, 2020, as a result of the correction of immaterial errors (in thousands): For the Three months ended December 31, 2020 As Originally Reported Impact of Prior Period Errors As RevisedConsolidated Statement of Operations General and administrative* $6,344 $2,462 $8,806Product development 1,098 146 1,244Sales and support 612 64 676Stock compensation expense 2,672 (2,672) — For the Nine months ended December 31, 2020 As Originally Reported Impact of Prior Period Errors As Revised General and administrative* $17,685 $12,641 $30,326Product development 2,595 438 3,033Sales and support 1,904 166 2,070Stock compensation expense 13,245 (13,245) — * General and administrative expense includes the reclassification of restructuring costs. Refer to Reclassifications below for further details. Depreciation, disposals and impairments In connection with preparing its financial statements for the quarter ended December 31, 2021, the Company determined that it understated depreciation and overstated loss on disposal of long-lived assets in its Consolidated Statement of Operations for the nine months ended December 31, 2021. In March 2021, the Company classified idled assets as Held for Future Use and suspended the depreciation for these assets. The depreciation should have been recognized evenly over the life of the asset without regard to whether the assets have been placed in service or is in use. Additionally, the Company reported disposals of assets that were in-use and misclassified certain disposals as impairments in the Consolidated Statement of Operations for the nine months ended December 31, 2021. The following table is a comparison of the results of operations for the nine months ended December 31, 2021, as a result of the correction of immaterial errors (in thousands): For the Nine months ended December 31, 2021 Impact of Prior Period ErrorsConsolidated Statement of Operations Depreciation and amortization $ 138Impairment of long-lived assets (127)Loss/(gain) from disposal of long-lived assets 35Net loss 46Net loss per common share basic and diluted — Share retirement In connection with preparing its financial statements for the quarter ended December 31, 2021, the Company determined that it incorrectly presented additional paid-in capital and accumulated deficit in its Consolidated Balance Sheets and Consolidated Statement of Stockholders’ Equity for the period ended June 30, 2021. The Company previously reported the retirement of shares from a May 2021 option exercise as a reduction to additional paid-in capital. The retirement of shares should have been reported as an increase to accumulated deficit. This transaction was presented in the stock option exercises line within the Consolidated Statement of Stockholders’ Equity. However, the Company should have reported this transaction in a separate line, retirement of common stock, along with the retirement of shares from the Company’s share repurchase program (refer to Note 7 Stockholders’ Equity for further discussion on the Company’s share repurchase program). Additionally, as a result of this error, the Company incorrectly omitted the shares surrendered from stock option exercises non-cash disclosure. The following table is a comparison of the reported financial position, changes to stockholders’ equity and cash flows as of December 31, 2021, as a result of the correction of immaterial errors (in thousands): For the period ended December 31, 2021 Impact of Prior Period ErrorsConsolidated Balance Sheets Additional paid-in capital $ 1,000Accumulated deficit (1,000) For the period ended December 31, 2021 Impact of Prior Period Errors Number of Shares Common Stock Additional paid-in capital Accumulated deficitConsolidated Statement of Stockholders’ Equity Stock option exercises 20 $ 1,000 $ —Retirement of common stock (20) — (1,000) Reclassifications Certain amounts previously reported in the Company’s Consolidated Statement of Operations for prior periods have been reclassified to conform to the presentation within this Quarterly Report on Form 10-Q. The reclassification includes the consolidation of the restructuring costs line into the general and administrative line within the Company’s Consolidated Statement of Operations.

Recently Issued Accounting Pronouncements

Recently Adopted Accounting Guidance In December 2019, the Financial Accounting Standard Board (“FASB”) issued Accounting Standard Updated (“ASU”) 2019-12, Simplifying the Accounting for Income Taxes (“ASU 2019-12”), which simplifies the accounting for income taxes by removing certain exceptions and improving the application of existing guidance. The new guidance is effective for annual and interim periods beginning after December 15, 2020. The adoption of ASU 2019-12 on April 1, 2021 did not have a material effect on the Company’s consolidated financial statements. Recently Issued Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instruments, and has subsequently modified several areas of Accounting Standards Codification 326, Financial Instruments – Credit Losses (“ASC 326”), 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 updates 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.