Assets and Liabilities, at Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Parenthetical) (Details)

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Assets and Liabilities, at Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Parenthetical) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Commemorative coin inventory, held at lower of cost or net realizable value	$ 3,103	$ 3,236