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Note 8 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 29, 2023
Apr. 30, 2022
May 01, 2021
Statement [Line Items]      
Beginning balance $ 2,079 $ 2,055 $ 1,974
Increases due to current period tax positions 75 114 150
Decreases due to lapse of statute of limitations and audit resolutions (58) (90) (69)
Ending balance $ 2,096 $ 2,079 $ 2,055