CONSOLIDATED STATEMENTS OF NET (LOSS) INCOME - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Oct. 30, 2022	Oct. 31, 2021	Oct. 30, 2022	Oct. 31, 2021
Income Statement [Abstract]
Net sales	$ 58,381,000	$ 74,561,000	$ 120,985,000	$ 157,608,000
Cost of sales	(60,594,000)	(63,834,000)	(119,071,000)	(134,382,000)
Gross (loss) profit	(2,213,000)	10,727,000	1,914,000	23,226,000
Selling, general and administrative expenses	(9,103,000)	(9,087,000)	(17,968,000)	(18,268,000)
Restructuring expense	(615,000)		(615,000)
(Loss) income from operations	(11,931,000)	1,640,000	(16,669,000)	4,958,000
Interest income	79,000	59,000	96,000	132,000
Other income (expense)	829,000	(404,000)	747,000	(640,000)
(Loss) income before income taxes	(11,023,000)	1,295,000	(15,826,000)	4,450,000
Income tax expense	(1,150,000)	(444,000)	(2,046,000)	(1,349,000)
Net (loss) income	$ (12,173,000)	$ 851,000	$ (17,872,000)	$ 3,101,000
Net (loss) income per share - basic	$ (0.99)	$ 0.07	$ (1.46)	$ 0.25
Net (loss) income per share - diluted	$ (0.99)	$ 0.07	$ (1.46)	$ 0.25
Average shares outstanding, basic	12,280	12,223	12,259	12,268
Average shares outstanding, diluted	12,280	12,316	12,259	12,369