Leases - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
|
| Lessee, Lease, Description [Line Items] | ||
| Operating leases, rent expense | $ 457 | $ 453 |
| Weighted average remaining lease term (in years) | 10 years 7 months 6 days | 3 years 6 months 3 days |
| Weighted average discount rate, percent | 8.75% | 5.89% |
| Corporate Headquarters | ||
| Lessee, Lease, Description [Line Items] | ||
| Operating leases, rent expense | $ 20 | $ 19 |
| Rockville, MD | ||
| Lessee, Lease, Description [Line Items] | ||
| Operating leases, rent expense | 437 | 422 |
| Additional recognition of operating lease right-of-use assets and operating lease liabilities | 6,300 | |
| Milan Italy | ||
| Lessee, Lease, Description [Line Items] | ||
| Operating leases, rent expense | $ 0 | $ 13 |