CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jul. 31, 2023	Jul. 31, 2022
Income Statement [Abstract]
Revenues	$ 37,726	$ 36,692
Cost of revenues	33,626	27,575
Gross profit	4,100	9,117
Operating expenses:
Selling, general and administrative	6,263	6,382
Total operating expenses	6,263	6,382
Operating income (loss)	(2,163)	2,735
Interest expense	(825)	(841)
Other income (expense), net	258	50
Net income (loss) before income taxes	(2,730)	1,944
Income tax expense (benefit)	(608)	583
Net income (loss)	(2,122)	1,361
Comprehensive income (loss)	$ (2,122)	$ 1,361
Net income (loss) per share:
Basic	$ (0.03)	$ 0.02
Diluted	$ (0.03)	$ 0.02
Weighted average common shares outstanding:
Basic	62,838	61,905
Diluted	62,838	63,333