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FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES    
Cash investments in money market funds   $ 160,000,000
Deposits in domestic and foreign financial institutions $ 357,271,708 $ 298,998,451