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Fair Value Measurements - Hierarchy and Transfers (Details) - USD ($) $ in Thousands | Apr. 27, 2024 | Apr. 29, 2023
--- | --- | ---
Assets |  |
Total assets | $ 19,502 | $ 24,903
Recurring basis |  |
Assets |  |
Marketable securities | 18,243 | 23,552
Held-to-maturity investments | 1,259 | 1,351
Total assets | 19,502 | 24,903
Recurring basis | Level 1 |  |
Assets |  |
Marketable securities | 0 | 0
Held-to-maturity investments | 1,259 | 1,351
Total assets | 1,259 | 1,351
Recurring basis | Level 2 |  |
Assets |  |
Marketable securities | 7,996 | 16,557
Held-to-maturity investments | 0 | 0
Total assets | 7,996 | 16,557
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 | 10,247 | 6,995
Held-to-maturity investments | 0 | 0
Total assets | $ 10,247 | $ 6,995

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