Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net Income (Loss)	$ (3,361,765)	$ 6,190,539	$ 1,765,849
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Cost of securities purchased	(20,996,174)	(42,951,997)	(42,776,519)
Proceeds from securities sold and matured	27,000,000	41,999,510	42,043,811
Cost of affiliated investments purchased	(58,895,360)	(85,861,938)	(51,266,245)
Proceeds from affiliated investments sold	59,790,265	76,457,032	50,660,726
Net accretion of discount on United States Treasury Obligations	(5,642)	(62,080)	(253,675)
Net realized (gain) loss on United States Treasury Obligations and Affiliated Investments		(579)	(673)
Net change in unrealized (gain) loss on United States Treasury Obligations and Affiliated Investments	463	1,174	(1,385)
Change in operating assets and liabilities:
Variation margin - Commodity Futures Contracts	(399,960)	89,200	160,800
Cash due from broker	(218,290)
Dividends from affiliates	(42)	2,924	2,324
Management fees	(2,749)	5,507	827
Brokerage commissions and fees		6	(6)
Net cash provided by (used in) operating activities	2,910,746	(4,130,702)	335,834
Cash flows from financing activities:
Distributions paid to shareholders			(200,161)
Proceeds from purchases of Shares	3,708,528	7,822,033
Redemption of Shares	(6,970,919)	(3,389,276)
Increase (decrease) in payable for amount due to custodian			(86,083)
Net cash provided by (used in) financing activities	(3,262,391)	4,432,757	(286,244)
Net change in cash	(351,645)	302,055	49,590
Cash at beginning of period	351,645	49,590	0
Cash at end of period	0	351,645	49,590
Supplemental disclosure of cash flow information
Cash paid for interest	$ 801	$ 1,167	$ 1,417