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Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract] |  |  |
Taxes paid | $ 14 | $ 7 | $ 61
Interest paid | 0 | 0 | 0
Non-cash investing activity: |  |  |
Capitalized change in estimated asset retirement obligations | (6) | (17) | 85
Network equipment provided in exchange for wireless licenses | 36 | 120 | 61
Non-cash financing activities: |  |  |
Shares surrendered from stock option exercises | 0 | 1,000 | 0
Equity payment of prior year accrued employee related expenses | $ 0 | $ 0 | $ 1,537

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- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(4) -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4297-108586 + Details
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