Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2017	$ 37,843,918	$ 946	$ 37,842,972
Balance - Shares at Dec. 31, 2017		40	1,600,000
Redemption of Shares - Value	(9,286,753)		$ (9,286,753)
Redemption of Shares - Shares			(400,000)
Net Increase (Decrease) due to Share Transactions, value	(9,286,753)		$ (9,286,753)
Net Increase (Decrease) due to Share Transactions, shares			(400,000)
Net Income (Loss)
Net Investment Income (Loss)	56,288	$ (1)	$ 56,289
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(704,660)	12	(704,672)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	530,883	(9)	530,892
Net Income (Loss)	(117,489)	2	(117,491)
Net Change in Shareholders' Equity, value	(9,404,242)	2	$ (9,404,244)
Net Change in Shareholders' Equity, shares			(400,000)
Balance - Value at Mar. 31, 2018	28,439,676	$ 948	$ 28,438,728
Balance - Shares at Mar. 31, 2018		40	1,200,000
Balance - Value at Dec. 31, 2018	23,519,910	$ 941	$ 23,518,969
Balance - Shares at Dec. 31, 2018		40	1,000,000
Net Income (Loss)
Net Investment Income (Loss)	97,656	$ 4	$ 97,652
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	303,714	12	303,702
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	573,815	23	573,792
Net Income (Loss)	975,185	39	975,146
Net Change in Shareholders' Equity, value	975,185	39	975,146
Balance - Value at Mar. 31, 2019	$ 24,495,095	$ 980	$ 24,494,115
Balance - Shares at Mar. 31, 2019		40	1,000,000