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CONTRACTS AND AGREEMENTS - Brokerage commission (Details) - USD ($)
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
CONTRACTS AND AGREEMENTS    
Brokerage commissions $ 175,146 $ 223,929
Commission    
CONTRACTS AND AGREEMENTS    
Brokerage commissions $ 175,146 $ 223,929
Percentage of commissions 0.04% 0.03%