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Note 8 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
May 03, 2025
Apr. 27, 2024
Apr. 29, 2023
Apr. 30, 2022
Unrecognized Tax Benefits $ 2,185 $ 2,130 $ 2,096 $ 2,079
Changes in Income Tax if All Uncertain Tax Positions Prevail 1,700      
Unrecognized Tax Benefits, Interest on Income Taxes Accrued $ 300      
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]        
Open Tax Year 2019 2020 2021 2022 2023 2024      
State and Local Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]        
Open Tax Year 2018 2019 2020 2021 2022 2023 2024