Fair Value Measurements - Schedule of Changes in Fair Value of the Level 3 Liabilities (Details) - Level 3 - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Balance at beginning of period | $ 9,981 | $ 25,737 |
| Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Gain (loss) on fair value of liability instruments | Gain (loss) on fair value of liability instruments |
| Changes in fair value of liability instruments, included in net loss | $ 47,704 | $ (15,756) |
| Reclassification to additional paid-in capital upon vesting of Earn-Out Shares | (57,685) | |
| Balance at end of period | $ 0 | $ 9,981 |