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Note 3 - Segment Reporting - Net Sales and Property and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
May 01, 2021
May 02, 2020
Apr. 27, 2019
Net sales $ 482,033 $ 608,932 $ 569,704
Property and equipment, net of accumulated depreciation 58,682 67,484 65,314
UNITED STATES      
Net sales 413,211 504,931 460,099
Property and equipment, net of accumulated depreciation 50,130 58,422 59,192
Non-US [Member]      
Net sales 68,822 104,001 109,605
Property and equipment, net of accumulated depreciation $ 8,552 $ 9,062 $ 6,122