Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2019	$ 116,953,198	$ 600	$ 116,952,598
Balance - Shares at Dec. 31, 2019		40	7,800,000
Purchases of Shares - Value	12,134,870		$ 12,134,870
Purchases of Shares - Shares			800,000
Redemption of Shares - Value	(24,766,771)		$ (24,766,771)
Redemption of Shares - Shares			(1,800,000)
Net Increase (Decrease) due to Share Transactions, value	(12,631,901)		$ (12,631,901)
Net Increase (Decrease) due to Share Transactions, shares			(1,000,000)
Net Income (Loss)
Net Investment Income (Loss)	224,024	$ 1	$ 224,023
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(3,245,313)	(17)	(3,245,296)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(16,988,095)	(88)	(16,988,007)
Net Income (Loss)	(20,009,384)	(104)	(20,009,280)
Net Change in Shareholders' Equity, value	(32,641,285)	(104)	$ (32,641,181)
Net Change in Shareholders' Equity, shares			(1,000,000)
Balance - Value at Mar. 31, 2020	84,311,913	$ 496	$ 84,311,417
Balance - Shares at Mar. 31, 2020		40	6,800,000
Balance - Value at Dec. 31, 2020	173,836,791	$ 688	$ 173,836,103
Balance - Shares at Dec. 31, 2020		40	10,100,000
Purchases of Shares - Value	102,989,605		$ 102,989,605
Purchases of Shares - Shares			5,600,000
Net Increase (Decrease) due to Share Transactions, value	102,989,605		$ 102,989,605
Net Increase (Decrease) due to Share Transactions, shares			5,600,000
Net Income (Loss)
Net Investment Income (Loss)	(379,425)	$ (1)	$ (379,424)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	16,955,868	61	16,955,807
Net Income (Loss)	16,576,443	60	16,576,383
Net Change in Shareholders' Equity, value	119,566,048	60	$ 119,565,988
Net Change in Shareholders' Equity, shares			5,600,000
Balance - Value at Mar. 31, 2021	$ 293,402,839	$ 748	$ 293,402,091
Balance - Shares at Mar. 31, 2021		40	15,700,000