XML 46 R30.htm IDEA: XBRL DOCUMENT v3.20.4
FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES    
Cash investments in money market funds $ 21,143,000 $ 160,000,000
Deposits in domestic and foreign financial institutions $ 419,339,567 $ 298,998,451