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Statements of Changes in Net Assets (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Opening balance (in shares)	8,600,000	6,550,000
Opening balance	$ 841,868	$ 499,078
Net investment loss	(1,285)	(796)
Realized gain on investment in Bullion	9,003	1,501
Change in unrealized (loss) on investment in Bullion	(65,524)	(8,769)
Change in unrealized (loss) on unsettled creations	$ (28)
Creations (in shares)	1,350,000	650,000
Creations	$ 129,519	$ 53,465
Redemptions (in shares)	(400,000)	(300,000)
Redemptions	$ (38,153)	$ (20,749)
Closing balance (in shares)	9,550,000	6,900,000
Closing balance	$ 875,400	$ 523,730

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