CONSOLIDATED STATEMENTS OF NET (LOSS) INCOME - USD ($) shares in Thousands	3 Months Ended
	Jul. 31, 2022	Aug. 01, 2021
Income Statement [Abstract]
Net sales	$ 62,604,000	$ 83,047,000
Cost of sales	(58,476,000)	(70,548,000)
Gross profit	4,128,000	12,499,000
Selling, general and administrative expenses	(8,866,000)	(9,181,000)
(Loss) income from operations	(4,738,000)	3,318,000
Interest income	17,000	74,000
Other expense	(82,000)	(237,000)
(Loss) income before income taxes	(4,803,000)	3,155,000
Income tax expense	(896,000)	(905,000)
Net (loss) income	$ (5,699,000)	$ 2,250,000
Net (loss) income per share - basic	$ (0.47)	$ 0.18
Net (loss) income per share - diluted	$ (0.47)	$ 0.18
Average shares outstanding, basic	12,238	12,313
Average shares outstanding, diluted	12,238	12,415