Quarterly report pursuant to Section 13 or 15(d)

TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Schedule of reconciliation of the beginning and ending balance for investments that use Level 3 inputs (Details)

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TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Schedule of reconciliation of the beginning and ending balance for investments that use Level 3 inputs (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Sep. 30, 2022
Mar. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Available-for-sale securities, beginning balance $ 161,364  
Available-for-sale securities, ending balance 168,175 $ 161,364
Available-for-sale securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Available-for-sale securities, beginning balance 1 1
Purchase of investments that use Level 3 inputs 446 0
Reclassification to level 2 0  
Sale of investments that use Level 3 inputs 0  
Revaluation of investments that use Level 3 inputs 0 0
Translation difference 0  
Reclassification to level 3   0
Reclassification to level 1   0
Available-for-sale securities, ending balance 447 1
Trading securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Investments beginning 9,142 19,032
Purchase of investments that use Level 3 inputs 1,750 10,812
Reclassification to level 2 (1,267)  
Sale of investments that use Level 3 inputs (4,716)  
Revaluation of investments that use Level 3 inputs (160) (3,014)
Translation difference (574)  
Reclassification to level 3   682
Reclassification to level 1   (18,370)
Investments ending $ 4,175 $ 9,142