Assets and Liabilities, at Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Parenthetical) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Jun. 30, 2025
Fair Value Disclosures [Abstract]
Collectible coin inventory, held at lower of cost or net realizable value	$ 76,096	$ 68,193