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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Short-Term Investments $ 92,434,914 $ 67,609,727
Exchange-Traded Futures Contracts    
Foreign Contracts 51,770 (6,289,510)
Fair Value, Inputs, Level 1 [Member]    
Short-Term Investments 92,434,914 67,609,727
Exchange-Traded Futures Contracts    
Foreign Contracts 51,770 (6,289,510)
Fair Value, Inputs, Level 2 [Member]    
Short-Term Investments 0 0
Exchange-Traded Futures Contracts    
Foreign Contracts 0 0
Fair Value, Inputs, Level 3 [Member]    
Short-Term Investments 0 0
Exchange-Traded Futures Contracts    
Foreign Contracts $ 0 $ 0