Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2018	$ 91,215,745	$ 493	$ 91,215,252
Balance - Shares at Dec. 31, 2018		40	7,400,000
Purchases of Shares - Value	8,264,339		$ 8,264,339
Purchases of Shares - Shares			600,000
Redemption of Shares - Value	(19,498,055)		$ (19,498,055)
Redemption of Shares - Shares			(1,400,000)
Net Increase (Decrease) due to Share Transactions, value	(11,233,716)		$ (11,233,716)
Net Increase (Decrease) due to Share Transactions, shares			(800,000)
Net Income (Loss)
Net Investment Income (Loss)	392,886	$ 2	$ 392,884
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(5,718,009)	(32)	(5,717,977)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	22,293,661	125	22,293,536
Net Income (Loss)	16,968,538	95	16,968,443
Net Change in Shareholders' Equity, value	5,734,822	95	$ 5,734,727
Net Change in Shareholders' Equity, shares			(800,000)
Balance - Value at Mar. 31, 2019	96,950,567	$ 588	$ 96,949,979
Balance - Shares at Mar. 31, 2019		40	6,600,000
Balance - Value at Dec. 31, 2019	64,331,913	$ 585	$ 64,331,328
Balance - Shares at Dec. 31, 2019		40	4,400,000
Purchases of Shares - Value	30,765,132		$ 30,765,132
Purchases of Shares - Shares			2,400,000
Redemption of Shares - Value	(29,020,836)		$ (29,020,836)
Redemption of Shares - Shares			(2,400,000)
Net Increase (Decrease) due to Share Transactions, value	1,744,296		$ 1,744,296
Net Income (Loss)
Net Investment Income (Loss)	106,032	$ 1	106,031
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(8,548,785)	(73)	(8,548,712)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(21,606,816)	(185)	(21,606,631)
Net Income (Loss)	(30,049,569)	(257)	(30,049,312)
Net Change in Shareholders' Equity, value	(28,305,273)	(257)	(28,305,016)
Balance - Value at Mar. 31, 2020	$ 36,026,640	$ 328	$ 36,026,312
Balance - Shares at Mar. 31, 2020		40	4,400,000