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FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Details) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES    
Cash investments in money market funds $ 177,943,000 $ 21,143,000
Deposits in domestic and foreign financial institutions $ 85,714,411 $ 419,339,567