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INVESTMENT SECURITIES (Tables) | 6 Months Ended
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Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract] |
Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Securities | The amortized cost and gross unrealized gains (losses) of marketable investment securities accounted under the fair value method were as follows:
| September 30, 2023
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized (Losses) |  | Fair Value (1)
Corporate debt securities | $ | 21,863 |  |  | $ | 3 |  |  | $ | (1,361) |  |  | $ | 20,505 |
U.S. treasury securities | 10,723 |  |  | — |  |  | (537) |  |  | 10,186 |
Certificates of deposit | 523 |  |  | — |  |  | — |  |  | 523 |
Total securities with unrealized gains/(losses) | $ | 33,109 |  |  | $ | 3 |  |  | $ | (1,898) |  |  | $ | 31,214 |
| March 31, 2023
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized (Losses) |  | Fair Value (1)
Corporate debt securities | $ | 24,936 |  |  | $ | 6 |  |  | $ | (1,325) |  |  | $ | 23,617 |
U.S. treasury securities | 13,400 |  |  | 15 |  |  | (425) |  |  | 12,990 |
Common stock | 768 |  |  | — |  |  | (584) |  |  | 184 |
Certificates of deposit | 518 |  |  | — |  |  | — |  |  | 518 |
Total securities with unrealized gains/(losses) | $ | 39,622 |  |  | $ | 21 |  |  | $ | (2,334) |  |  | $ | 37,309 |
Schedule of Maturities of Debt Securities | Scheduled maturities of the debt securities held by the Company included within the investment securities portfolio were as follows:
| September 30, 2023 |  | March 31, 2023
| Amortized Cost |  | Estimated Fair Value |  | Amortized Cost |  | Estimated Fair Value
Due within one year | $ | 3,969 |  |  | $ | 3,927 |  |  | $ | 6,243 |  |  | $ | 6,254 |
Due within years two through five | 29,140 |  |  | 27,287 |  |  | 33,379 |  |  | 31,055 |
Total debt within the investment securities portfolio | $ | 33,109 |  |  | $ | 31,214 |  |  | $ | 39,622 |  |  | $ | 37,309 |

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