Derivative Instruments - Derivatives by Line Item in Statement of Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net gain (loss) from futures and forward currency trading
Total realized and changed in unrealized net gain (loss)	$ 7,548,576	$ (3,242,956)	$ 3,123,843
Futures, Forward, and Swap Contracts
Net gain (loss) from futures and forward currency trading
Total realized and changed in unrealized net gain (loss)	7,548,576	(3,242,956)	3,123,843
Futures Contracts
Net gain (loss) from futures and forward currency trading
Realized	7,389,071	(3,159,282)	3,217,037
Change in unrealized	(1,325,734)	(917,117)	364,735
Total realized and changed in unrealized net gain (loss)	6,063,337	(4,076,399)	3,581,772
Forward Contracts
Net gain (loss) from futures and forward currency trading
Realized	408,554	146,701	(2,396,861)
Change in unrealized	(27,645)	(67,055)	24,922
Total realized and changed in unrealized net gain (loss)	380,909	79,646	(2,371,939)
Swap Contracts
Net gain (loss) from futures and forward currency trading
Change in unrealized	1,104,330	753,797	1,914,010
Total realized and changed in unrealized net gain (loss)	$ 1,104,330	$ 753,797	$ 1,914,010