Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2015	$ 38,565,777	$ 857	$ 38,564,920
Balance - Shares at Dec. 31, 2015		40	1,800,000
Purchases of Shares - Value	17,343,128		$ 17,343,128
Purchases of Shares - Shares			800,000
Redemption of Shares - Value	(13,247,771)		$ (13,247,771)
Redemption of Shares - Shares			(600,000)
Net Increase (Decrease) due to Share Transactions, value	4,095,357		$ 4,095,357
Net Increase (Decrease) due to Share Transactions, shares			200,000
Net Income (Loss)
Net Investment Income (Loss)	(116,413)	$ (2)	$ (116,411)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	1,930,221	32	1,930,189
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(608,432)	(10)	(608,422)
Net Income (Loss)	1,205,376	20	1,205,356
Net Change in Shareholders' Equity, value	5,300,733	20	$ 5,300,713
Net Change in Shareholders' Equity, shares			200,000
Balance - Value at Jun. 30, 2016	43,866,510	$ 877	$ 43,865,633
Balance - Shares at Jun. 30, 2016		40	2,000,000
Balance - Value at Mar. 31, 2016	49,158,217	$ 894	$ 49,157,323
Balance - Shares at Mar. 31, 2016		40	2,200,000
Purchases of Shares - Value	4,487,219		$ 4,487,219
Purchases of Shares - Shares			200,000
Redemption of Shares - Value	(8,965,745)		$ (8,965,745)
Redemption of Shares - Shares			(400,000)
Net Increase (Decrease) due to Share Transactions, value	(4,478,526)		$ (4,478,526)
Net Increase (Decrease) due to Share Transactions, shares			200,000
Net Income (Loss)
Net Investment Income (Loss)	(55,683)	$ (1)	$ (55,682)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	1,407,949	22	1,407,927
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(2,165,447)	(38)	(2,165,409)
Net Income (Loss)	(813,181)	(17)	(813,164)
Net Change in Shareholders' Equity, value	(5,291,707)	(17)	$ (5,291,690)
Net Change in Shareholders' Equity, shares			(200,000)
Balance - Value at Jun. 30, 2016	43,866,510	$ 877	$ 43,865,633
Balance - Shares at Jun. 30, 2016		40	2,000,000
Balance - Value at Dec. 31, 2016	32,749,139	$ 819	$ 32,748,320
Balance - Shares at Dec. 31, 2016		40	1,600,000
Purchases of Shares - Value	8,413,425		$ 8,413,425
Purchases of Shares - Shares			400,000
Net Increase (Decrease) due to Share Transactions, value	8,413,425		$ 8,413,425
Net Increase (Decrease) due to Share Transactions, shares			400,000
Net Income (Loss)
Net Investment Income (Loss)	(23,363)	$ (1)	$ (23,362)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	1,908,562	42	1,908,520
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	534,564	12	534,552
Net Income (Loss)	2,419,763	53	2,419,710
Net Change in Shareholders' Equity, value	10,833,188	53	$ 10,833,135
Net Change in Shareholders' Equity, shares			400,000
Balance - Value at Jun. 30, 2017	43,582,327	$ 872	$ 43,581,455
Balance - Shares at Jun. 30, 2017		40	2,000,000
Balance - Value at Mar. 31, 2017	37,518,384	$ 834	$ 37,517,550
Balance - Shares at Mar. 31, 2017		40	1,800,000
Purchases of Shares - Value	4,268,495		$ 4,268,495
Purchases of Shares - Shares			200,000
Net Increase (Decrease) due to Share Transactions, value	4,268,495		$ 4,268,495
Net Increase (Decrease) due to Share Transactions, shares			200,000
Net Income (Loss)
Net Investment Income (Loss)	(224)		$ (224)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	1,675,950	$ 36	1,675,914
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	119,722	2	119,720
Net Income (Loss)	1,795,448	38	1,795,410
Net Change in Shareholders' Equity, value	6,063,943	38	$ 6,063,905
Net Change in Shareholders' Equity, shares			200,000
Balance - Value at Jun. 30, 2017	$ 43,582,327	$ 872	$ 43,581,455
Balance - Shares at Jun. 30, 2017		40	2,000,000