| Assets and Liabilities, at Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Parenthetical) (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Jun. 30, 2024 | 
|---|---|---|
| Fair Value Disclosures [Abstract] | ||
| Collectible coin inventory, held at lower of cost or net realizable value | $ 58,769 | $ 3,236 | 
| X | ||||||||||
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- Definition Inventory collectible coin stated at lower cost or market. No definition available. 
 | 
| X | ||||||||||
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- References No definition available. 
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