Statements of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2024	Jun. 30, 2024
Schedule of Investments [Abstract]
Cost of investment in gold bullion	$ 531,880	$ 554,189
Common stock , no par value	$ 0	$ 0
Common stock, shares authorized	Unlimited	Unlimited