Fair Value Measurements - Summary of Strategic Investments (Detail) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Strategic Investments [Line Items] | ||
| Total strategic investments | $ 249,732 | $ 91,000 |
| Publicly-traded Equity Securities [Member] | ||
| Strategic Investments [Line Items] | ||
| Total strategic investments | 71,598 | 0 |
| Convertible Debt Securities [Member] | ||
| Strategic Investments [Line Items] | ||
| Total strategic investments | 29,059 | 36,000 |
| Privately Held Equity Securities [Member] | ||
| Strategic Investments [Line Items] | ||
| Total strategic investments | 30,000 | 30,000 |
| SAFE Investments [Member] | ||
| Strategic Investments [Line Items] | ||
| Total strategic investments | $ 119,075 | $ 25,000 |