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FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES    
Money market funds $ 30,347,000 $ 23,000,000
cash deposit and investment in treasury $ 314,991,258 $ 60,603,440