Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	$ 23,999,594	$ 28,910,162
Money Market Mutual Fund	11,811,626	21,851,133
Total Investments in Securities	35,811,220	50,761,295
Currency Futures Contracts	(813,665)	315,919
Total Investments	34,997,555	51,077,214
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money Market Mutual Fund	11,811,626	21,851,133
Total Investments in Securities	11,811,626	21,851,133
Currency Futures Contracts	(813,665)	315,919
Total Investments	10,997,961	22,167,052
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	23,999,594	28,910,162
Total Investments in Securities	23,999,594	28,910,162
Total Investments	$ 23,999,594	$ 28,910,162