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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    
Money market funds $ 220,847,000 $ 30,347,000
cash deposit and investment in treasury $ 92,707,615 $ 314,991,258