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TRADING AND AVAILABLE-FOR-SALE SECURITIES AT FAIR VALUE - Schedule of valuation techniques and significant level 3 inputs used in the valuation (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 9,144 | $ 19,069
Corporate equity |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 0 | 18,408
Fair value input (in percent) | 10.60% |
Estimated number of years | 9 years |
Corporate equity |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 253 | 301
Fair value input (in percent) | 20.00% |
Estimated number of years | 9 years |
Corporate debt |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 595 | 360
Fair value input (in percent) | 45.00% |
Estimated number of years | 3 months |
Non-US sovereign debt |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 7,524 | 0
Fair value input (in percent) | 69.00% |
Estimated number of years | 11 years |
Non-US sovereign debt |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 772 | $ 0
Fair value input (in percent) | 13.90% |
Estimated number of years | 1 year |

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