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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Jul. 27, 2024
Apr. 27, 2024
Assets    
Total assets $ 14,809 $ 19,502
Recurring basis    
Assets    
Marketable securities 13,510 18,243
Held-to-maturity investments 1,299 1,259
Total assets 14,809 19,502
Recurring basis | Level 1    
Assets    
Marketable securities 0 0
Held-to-maturity investments 1,299 1,259
Total assets 1,299 1,259
Recurring basis | Level 2    
Assets    
Marketable securities 5,622 7,996
Held-to-maturity investments 0 0
Total assets 5,622 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 7,888 10,247
Held-to-maturity investments 0 0
Total assets $ 7,888 $ 10,247