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SECURITIES SOLD, NOT YET PURCHASED AT FAIR VALUE - Schedule of Securities (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
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Sep. 30, 2022 | Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract] |  |  |  |
Securities sold, not yet purchased at fair value, beginning balance | $ 13,865 | [1] | $ 8,569 |
Short sales | 410 |  | 7,055 |
Repurchase | (7,665) |  | (346) |
Net gain on trading securities | 766 |  | (1,413) |
Securities sold, not yet purchased at fair value, ending balance | $ 7,376 |  | $ 13,865 | [1]
[1] | * Please see Note 3

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