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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
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Mar. 31, 2023 | Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 5,138 | $ 9,142
Corporate equity |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 961 | $ 251
Fair value input (in percent) | 58.80% | 20.00%
Estimated number of years | 9 years | 9 years
Corporate debt |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 399 | $ 595
Fair value input (in percent) | 74.00% | 45.00%
Estimated number of years | 3 months | 3 months
Non-US sovereign debt |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value | $ 3,778 | $ 7,524
Fair value input (in percent) | 48.80% | 69.00%
Estimated number of years | 11 years | 11 years
Non-US sovereign debt |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value |  | $ 772
Fair value input (in percent) |  | 13.90%
Estimated number of years |  | 1 year

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