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CONSOLIDATED STATEMENTS OF NET INCOME (LOSS) - USD ($)
shares in Thousands
 3 Months Ended 6 Months Ended
Oct. 31, 2021
Nov. 01, 2020
Oct. 31, 2021
Nov. 01, 2020
Income Statement [Abstract]        
Net sales $ 74,561,000 $ 76,851,000 $ 157,608,000 $ 141,315,000
Cost of sales (63,834,000) (62,590,000) (134,382,000) (117,153,000)
Gross profit 10,727,000 14,261,000 23,226,000 24,162,000
Selling, general and administrative expenses (9,087,000) (9,743,000) (18,268,000) (17,761,000)
Income from operations 1,640,000 4,518,000 4,958,000 6,401,000
Interest expense       (51,000)
Interest income 59,000 59,000 132,000 117,000
Other expense (404,000) (680,000) (640,000) (1,046,000)
Income before income taxes 1,295,000 3,897,000 4,450,000 5,421,000
Income tax expense (444,000) (1,613,000) (1,349,000) (5,937,000)
Income from investment in unconsolidated joint venture   100,000   167,000
Net income (loss) $ 851,000 $ 2,384,000 $ 3,101,000 $ (349,000)
Net income (loss) per share - basic $ 0.07 $ 0.19 $ 0.25 $ (0.03)
Net income (loss) per share - diluted $ 0.07 $ 0.19 $ 0.25 $ (0.03)
Average shares outstanding, basic 12,223 12,298 12,268 12,293
Average shares outstanding, diluted 12,316 12,324 12,369 12,293