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Fair Value Measurements (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Fair Value Measurements    
Investments Owned, Fair Value $ 50,080,807 $ 60,736,458
Amount of transfers among Levels 1, 2, and 3 0 0
Recurring basis    
Fair Value Measurements    
Total - Assets 54,027,160 66,874,383
Recurring basis | Futures Contracts    
Fair Value Measurements    
Open derivative contracts, fair value 401,807 1,727,541
Recurring basis | Forward Contracts    
Fair Value Measurements    
Open derivative contracts, fair value (69,073) (41,428)
Recurring basis | Swap Contracts    
Fair Value Measurements    
Open derivative contracts, fair value 3,037,439 1,933,109
Recurring basis | U.S. money market fund    
Fair Value Measurements    
Cash and cash equivalents 576,180 2,518,703
Recurring basis | U.S. Government-sponsored enterprises    
Fair Value Measurements    
Investments Owned, Fair Value 31,644,430 41,635,179
Recurring basis | U.S. Government securities    
Fair Value Measurements    
Investments Owned, Fair Value 13,431,977 14,752,579
Recurring basis | U.S. Exchange Traded Funds    
Fair Value Measurements    
Investments Owned, Fair Value 5,004,400 4,348,700
Recurring basis | Level 1    
Fair Value Measurements    
Total - Assets 5,982,387 8,594,944
Recurring basis | Level 1 | Futures Contracts    
Fair Value Measurements    
Open derivative contracts, fair value 401,807 1,727,541
Recurring basis | Level 1 | U.S. money market fund    
Fair Value Measurements    
Cash and cash equivalents 576,180 2,518,703
Recurring basis | Level 1 | U.S. Exchange Traded Funds    
Fair Value Measurements    
Investments Owned, Fair Value 5,004,400 4,348,700
Recurring basis | Level 2    
Fair Value Measurements    
Total - Assets 48,044,773 58,279,439
Recurring basis | Level 2 | Forward Contracts    
Fair Value Measurements    
Open derivative contracts, fair value (69,073) (41,428)
Recurring basis | Level 2 | Swap Contracts    
Fair Value Measurements    
Open derivative contracts, fair value 3,037,439 1,933,109
Recurring basis | Level 2 | U.S. Government-sponsored enterprises    
Fair Value Measurements    
Investments Owned, Fair Value 31,644,430 41,635,179
Recurring basis | Level 2 | U.S. Government securities    
Fair Value Measurements    
Investments Owned, Fair Value $ 13,431,977 $ 14,752,579