Schedule of Investments (Unaudited) - Futures Contracts		3 Months Ended	12 Months Ended
		Mar. 31, 2020 USD ($) Contract	Dec. 31, 2019 USD ($) Contract
Schedule of Investments [Line Items]
Commodity Futures Contracts, Value		$ 142,455,246	$ 141,454,423
Futures [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Value	[1]	(2,813,535)	14,607,615
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (2,813,535)	$ 14,607,615
Futures [Member] | COMEX Gold [Member] | Long [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		728	741
Commodity Futures Contracts, Expiration Date		Feb. 28, 2021	Feb. 29, 2020
Commodity Futures Contracts, Notional Value		$ 116,378,080	$ 112,861,710
Commodity Futures Contracts, Value	[1]	272,634	11,493,134
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ 272,634	$ 11,493,134
Futures [Member] | COMEX Silver [Member] | Long [Member]
Schedule of Investments [Line Items]
Commodity Futures Contracts, Number of Contracts | Contract		320	319
Commodity Futures Contracts, Expiration Date		May 31, 2020	May 31, 2020
Commodity Futures Contracts, Notional Value		$ 22,649,600	$ 28,724,355
Commodity Futures Contracts, Value	[1]	(3,086,169)	3,114,481
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	[1]	$ (3,086,169)	$ 3,114,481

[1] Unrealized Appreciation (Depreciation) and Value are presented above, net by contract.