Assets and Liabilities, at Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Parenthetical) (Details) - USD ($) |
Dec. 31, 2021 |
Jun. 30, 2021 |
|---|---|---|
| Fair Value Disclosures [Abstract] | ||
| Commemorative coin inventory, held at lower of cost or net realizable value | $ 886,000 | $ 406,000 |
| X | ||||||||||
- Definition Inventory, Commemorative Coin, Stated At Lower Cost Or Market No definition available.
|
| X | ||||||||||
- References No definition available.
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