Statement of Changes in Shareholders' Equity - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2018	$ 13,828,606	$ 922	$ 13,827,684
Balance - Shares at Dec. 31, 2018		40	600,000
Return of Capital Distributions	(200,161)	$ (13)	$ (200,148)
Net Income (Loss)
Net Investment Income (Loss)	199,990	13	199,977
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	341,122	23	341,099
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	1,224,737	81	1,224,656
Net Income (Loss)	1,765,849	117	1,765,732
Net Change in Shareholders' Equity, value	1,565,688	104	1,565,584
Balance - Value at Dec. 31, 2019	15,394,294	$ 1,026	$ 15,393,268
Balance - Shares at Dec. 31, 2019		40	600,000
Purchases of Shares - Value	7,822,033		$ 7,822,033
Purchases of Shares - Shares			200,000
Redemption of Shares - Value	(3,389,276)		$ (3,389,276)
Redemption of Shares - Shares			(100,000)
Net Increase (Decrease) due to Share Transactions, value	4,432,757		$ 4,432,757
Net Increase (Decrease) due to Share Transactions, shares			100,000
Net Income (Loss)
Net Investment Income (Loss)	(53,322)	$ (4)	$ (53,318)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	726,603	54	726,549
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	5,517,258	411	5,516,847
Net Income (Loss)	6,190,539	461	6,190,078
Net Change in Shareholders' Equity, value	10,623,296	461	$ 10,622,835
Net Change in Shareholders' Equity, shares			100,000
Balance - Value at Dec. 31, 2020	26,017,590	$ 1,487	$ 26,016,103
Balance - Shares at Dec. 31, 2020		40	700,000
Purchases of Shares - Value	3,708,528		$ 3,708,528
Purchases of Shares - Shares			100,000
Redemption of Shares - Value	(6,970,919)		$ (6,970,919)
Redemption of Shares - Shares			(200,000)
Net Increase (Decrease) due to Share Transactions, value	(3,262,391)		$ (3,262,391)
Net Increase (Decrease) due to Share Transactions, shares			(100,000)
Net Income (Loss)
Net Investment Income (Loss)	(178,218)	$ (10)	$ (178,208)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	3,553,040	205	3,552,835
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(6,736,587)	(389)	(6,736,198)
Net Income (Loss)	(3,361,765)	(194)	(3,361,571)
Net Change in Shareholders' Equity, value	(6,624,156)	(194)	$ (6,623,962)
Net Change in Shareholders' Equity, shares			(100,000)
Balance - Value at Dec. 31, 2021	$ 19,393,434	$ 1,293	$ 19,392,141
Balance - Shares at Dec. 31, 2021		40	600,000