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Investments (Narrative) (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Jul. 19, 2019 USD ($) Coins | Nov. 30, 2018 USD ($)
Disclosure Of Investments [Line Items] |  |  |  |
Non-material investments in private and public companies | $ 981,736 | $ 0 |  |
Realized gain on investments | 6,639 | 1,274,834 |  |
Unrealized gain on investments | $ 794,350 | $ 0 |  |
Subscription agreement with Amber AI [Member] |  |  |  |
Disclosure Of Investments [Line Items] |  |  |  |
Market value of digital currency |  |  |  | $ 3,342,285
Number of Ethereum coins redeemed | Coins |  |  | 14,866 |
Fair market value of redeemed Ethereum coins |  |  | $ 3,289,398 |

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