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Consolidated Statements of Operations (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Net (loss) gain allocated from investment in Graham Alternative Investment Trading LLC    
Net realized gain on investments $ 1,790,086 $ 243,410
Net decrease in unrealized appreciation on investments (972,755) (991,716)
Brokerage commissions and fees (78,101) (83,908)
Net (loss) gain allocated from investment in Graham Alternative Investment Trading LLC 739,230 (832,214)
Investment income    
Interest income 124,913 92,823
Expenses    
Advisory fees 142,186 250,544
Sponsor fees 74,114 186,670
Professional fees and other 23,150 48,405
Administrator's fees 12,229 19,288
Incentive allocation 0 0
Total expenses 251,679 504,907
Net investment loss allocated from investment in Graham Alternative Investment Trading LLC (126,766) (412,084)
Net loss $ 612,464 $ (1,244,298)