Significant Accounting Policies - Estimated Fair Value of Assets and Liability (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Asset: | ||
| Asset, fair value | $ 223,890 | $ 218,472 |
| U.S. Treasury Securities | ||
| Asset: | ||
| Asset, fair value | 178,486 | 168,095 |
| Money Market Fund | ||
| Asset: | ||
| Asset, fair value | 40,404 | 45,377 |
| Repo Securities | ||
| Asset: | ||
| Asset, fair value | 5,000 | 5,000 |
| Level 1 | ||
| Asset: | ||
| Asset, fair value | 218,890 | 213,472 |
| Level 1 | U.S. Treasury Securities | ||
| Asset: | ||
| Asset, fair value | 178,486 | 168,095 |
| Level 1 | Money Market Fund | ||
| Asset: | ||
| Asset, fair value | 40,404 | 45,377 |
| Level 2 | ||
| Asset: | ||
| Asset, fair value | 5,000 | 5,000 |
| Level 2 | Repo Securities | ||
| Asset: | ||
| Asset, fair value | $ 5,000 | $ 5,000 |