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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Oct. 25, 2025
Apr. 26, 2025
Assets    
Total assets $ 15,321 $ 14,901
Recurring basis    
Assets    
Marketable securities 12,678 12,294
Held-to-maturity investments 2,643 2,607
Total assets 15,321 14,901
Level 1 | Recurring basis    
Assets    
Marketable securities 0 0
Held-to-maturity investments 2,643 2,607
Total assets 2,643 2,607
Level 2 | Recurring basis    
Assets    
Marketable securities 2,511 2,470
Held-to-maturity investments 0 0
Total assets 2,511 2,470
Level 3 | Recurring basis    
Assets    
Marketable securities 0 0
Held-to-maturity investments 0 0
Total assets 0 0
NAV | Recurring basis    
Assets    
Marketable securities 10,167 9,824
Held-to-maturity investments 0 0
Total assets $ 10,167 $ 9,824