Fair Value Measurements - Schedule of Changes in Carrying Amount of Digital Assets (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Sep. 30, 2025 |
Dec. 31, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | |||||
| Fair Value, Beginning Balance | $ 99,369 | $ 0 | $ 0 | ||
| Purchases of digital assets | 100,000 | ||||
| Change in fair value of digital assets | (26,516) | (631) | $ 0 | (27,147) | $ 0 |
| Digital assets transferred as collateral | (10,696) | ||||
| Digital assets returned by GSR Markets | 1,813 | ||||
| Fair Value, Ending Balance | $ 63,970 | $ 99,369 | $ 63,970 | ||