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Leases (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2022
May 01, 2021
May 02, 2020
Lessor, Lease, Description [Line Items]      
Operating lease, weighted average remaining lease term 3 years 7 months 6 days 4 years 8 months 12 days  
Operating lease, weighted average discount rate, percent 2.40% 3.30%  
Cost of sales      
Lessor, Lease, Description [Line Items]      
Operating lease, cost $ 2,425 $ 2,241 $ 2,325
Operating expense      
Lessor, Lease, Description [Line Items]      
Operating lease, cost $ 870 $ 977 $ 1,116
Minimum      
Lessor, Lease, Description [Line Items]      
Lessee, operating lease, term of contract 1 year    
Maximum      
Lessor, Lease, Description [Line Items]      
Lessee, operating lease, term of contract 5 years