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, 2022  | 
Jun. 30, 2022  | 
|---|---|---|
| Fair Value Disclosures [Abstract] | ||
| Commemorative coin inventory, held at lower of cost or net realizable value | $ 1,211 | $ 1,434 | 
| X | ||||||||||
- Definition Inventory, Commemorative Coin, Stated At Lower Cost Or Market No definition available. 
  | 
| X | ||||||||||
- References No definition available. 
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