Other Income, Net - Summary of Components of Other Income, Net (Detail) - USD ($) $ in Thousands |
8 Months Ended | 12 Months Ended | |
|---|---|---|---|
Dec. 31, 2025 |
Apr. 30, 2025 |
Apr. 30, 2024 |
|
| Other Nonoperating Income (Expense) [Abstract] | |||
| R&D tax credit | $ 3,722 | $ 5,014 | $ 8,452 |
| Realized gain on sale of marketable securities | 1,227 | 1,561 | 1,325 |
| Change in fair value of derivative liability | 3,390 | (1,760) | |
| Other | 217 | (3) | (10) |
| Total other income, net | $ 8,556 | $ 4,812 | $ 9,767 |