Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2018	$ 108,880,930	$ 1,452	$ 108,879,478
Balance - Shares at Dec. 31, 2018		40	3,000,000
Purchases of Shares - Value	29,269,146		$ 29,269,146
Purchases of Shares - Shares			800,000
Redemption of Shares - Value	(21,645,716)		$ (21,645,716)
Redemption of Shares - Shares			(600,000)
Net Increase (Decrease) due to Share Transactions, value	7,623,430		$ 7,623,430
Net Increase (Decrease) due to Share Transactions, shares			200,000
Net Income (Loss)
Net Investment Income (Loss)	538,690	$ 1	$ 538,689
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	2,696,531	7	2,696,524
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(3,644,852)	(9)	(3,644,843)
Net Income (Loss)	(409,631)	(1)	(409,630)
Net Change in Shareholders' Equity, value	7,213,799	(1)	$ 7,213,800
Net Change in Shareholders' Equity, shares			200,000
Balance - Value at Mar. 31, 2019	116,094,729	$ 1,451	$ 116,093,278
Balance - Shares at Mar. 31, 2019		40	3,200,000
Balance - Value at Dec. 31, 2019	141,736,392	$ 1,668	$ 141,734,724
Balance - Shares at Dec. 31, 2019		40	3,400,000
Purchases of Shares - Value	41,508,133		$ 41,508,133
Purchases of Shares - Shares			1,000,000
Redemption of Shares - Value	(40,645,721)		$ (40,645,721)
Redemption of Shares - Shares			(1,000,000)
Net Increase (Decrease) due to Share Transactions, value	862,412		$ 862,412
Net Income (Loss)
Net Investment Income (Loss)	268,901	$ 2	268,899
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	13,631,863	124	13,631,739
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(17,420,969)	(158)	(17,420,811)
Net Income (Loss)	(3,520,205)	(32)	(3,520,173)
Net Change in Shareholders' Equity, value	(2,657,793)	(32)	(2,657,761)
Balance - Value at Mar. 31, 2020	$ 139,078,599	$ 1,636	$ 139,076,963
Balance - Shares at Mar. 31, 2020		40	3,400,000