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 |