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Supplemental Disclosure of Cash Flow Information (Details) $ in Thousands | 12 Months Ended
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Mar. 31, 2022 USD ($) | Mar. 31, 2022 country | Mar. 31, 2022 county | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($)
Supplemental Cash Flow Elements [Abstract] |  |  |  |  |
Taxes paid | $ 7 |  |  | $ 61 | $ 36
Interest paid | 0 |  |  | 0 | 0
Non-cash investing activity: |  |  |  |  |
Capitalized change in estimated asset retirement obligations | (17) |  |  | 85 | 557
Contribution of patent to TeamConnect LLC | 0 |  |  | 0 | 34
Contribution of capital equipment to TeamConnect LLC | 0 |  |  | 0 | 14
Network equipment provided in exchange for wireless licenses | 120 |  |  | 61 | 21
Non-cash activity: |  |  |  |  |
Shares surrendered from stock option exercises | 1,000 |  |  | 0 | 0
Equity payment of prior year accrued employee related expenses | 0 |  |  | 1,537 | 0
Broadband licenses granted, number of countries |  | 21 | 21 |  |
Gain (loss) from disposal of intangible assets, net | $ 11,209 |  |  | $ (3,849) | $ (88)

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