CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Income Statement [Abstract]
Revenues	$ 149,266	$ 119,597	$ 95,868
Cost of revenues	117,786	82,949	66,561
Gross profit	31,480	36,648	29,307
Operating expenses:
Selling, general and administrative	27,879	21,226	17,064
Total operating expenses	27,879	21,226	17,064
Operating income	3,601	15,422	12,243
Interest expense	(2,600)	(2,680)	(1,164)
Other income (expense), net	1,002	(81)	133
Net income before income taxes	2,003	12,661	11,212
Income tax (expense) benefit	(1,443)	115,011	0
Net income	560	127,672	11,212
Comprehensive income	560	127,672	11,212
Series E preferred stock accumulated dividends	0	0	(4,455)
Impact of Series E preferred stock redemption	0	0	(3,439)
Net income attributable to common stockholders	$ 560	$ 127,672	$ 3,318
Net income per share attributable to common stockholders:
Basic	$ 0.01	$ 2.08	$ 0.06
Diluted	$ 0.01	$ 1.84	$ 0.06
Weighted average common shares outstanding:
Basic	62,268	61,484	58,222
Diluted	63,782	70,474	59,426