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Note 9 - Leases (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
May 01, 2021
May 02, 2020
Operating Lease, Weighted Average Discount Rate, Percent 3.30% 3.40%
Operating Lease, Weighted Average Remaining Lease Term (Year) 4 years 8 months 12 days 5 years
Operating Lease, Expense for Extension $ 3,879  
Cost of Sales [Member]    
Operating Lease, Cost 2,241 $ 2,325
Operating Expense [Member]    
Operating Lease, Cost $ 977 $ 1,116
Minimum [Member]    
Lessee, Operating Lease, Term of Contract (Year) 1 year  
Maximum [Member]    
Lessee, Operating Lease, Term of Contract (Year) 5 years