Fair Value Measurements - Hierarchy and Transfers (Details) - USD ($) $ in Thousands |
Apr. 26, 2025 |
Apr. 27, 2024 |
|---|---|---|
| Assets | ||
| Total assets | $ 14,901 | $ 19,502 |
| Recurring basis | ||
| Assets | ||
| Marketable securities | 12,294 | 18,243 |
| Held-to-maturity investments | 2,607 | 1,259 |
| Total assets | 14,901 | 19,502 |
| Recurring basis | Level 1 | ||
| Assets | ||
| Marketable securities | 0 | 0 |
| Held-to-maturity investments | 2,607 | 1,259 |
| Total assets | 2,607 | 1,259 |
| Recurring basis | Level 2 | ||
| Assets | ||
| Marketable securities | 2,470 | 7,996 |
| Held-to-maturity investments | 0 | 0 |
| Total assets | 2,470 | 7,996 |
| Recurring basis | Level 3 | ||
| Assets | ||
| Marketable securities | 0 | 0 |
| Held-to-maturity investments | 0 | 0 |
| Total assets | 0 | 0 |
| Recurring basis | NAV | ||
| Assets | ||
| Marketable securities | 9,824 | 10,247 |
| Held-to-maturity investments | 0 | 0 |
| Total assets | $ 9,824 | $ 10,247 |