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Marketable Securities and Other Investments (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2024
Gain (Loss) on Securities [Line Items] |  |  |  |  |
Unrealized gain (loss) on investments | $ (349,000) | $ 660,000 | $ (113,000) | $ 390,000 |
Net realized gains on sale of marketable securities | 217,000 | 0 | 275,000 | 0 |
Accounts receivable balance | 157,038,000 |  | 157,038,000 |  | $ 171,186,000
Related Party | EMC |  |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |  |
Accounts receivable balance | $ 9,500,000 |  | $ 9,500,000 |  | 10,300,000
EMC |  |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |  |
Ownership interest | 49.00% |  | 49.00% |  |
Carrying values of investments | $ 3,676,000 |  | $ 3,676,000 |  | $ 3,377,000
Investment income | $ 99,000 | $ 5,000 | $ 436,000 | $ 589,000 |

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