Description of Company and Basis of Presentation (Details - Statement of loss and comprehensive loss) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Revenues	$ 25,395	$ 34,757	$ 63,121	$ 71,449
Cost of revenues	30,060	30,610	63,686	58,185
Gross loss	(4,665)	4,147	(565)	13,264
Operating expenses:
Selling, general and administrative	6,557	6,831	12,820	13,213
Total operating expenses	6,557		12,820
Operating loss	(11,222)	(2,684)	(13,385)	51
Interest expense	(827)	(877)	(1,652)	(1,718)
Other income, net	140		398
Net Loss before income taxes	(11,909)	(3,416)	(14,639)	(1,472)
Income tax benefit	(2,388)	(2,896)	(2,996)	(2,313)
Net loss	(9,521)	(520)	(11,643)	841
Comprehensive loss	$ (9,521)	$ (520)	$ (11,643)	$ 841
Net loss per share:
Basic	$ (0.15)	$ (0.01)	$ (0.18)	$ 0.01
Diluted	$ (0.15)	$ (0.01)	$ (0.18)	$ (0.00)
Weighted average common shares outstanding:
Basic	63,149	62,204	62,994	62,054
Diluted	63,149	62,204	62,994	70,350
Previously Reported [Member]
Revenues	$ 25,395		$ 63,121
Cost of revenues	30,060		63,686
Gross loss	(4,665)		(565)
Operating expenses:
Selling, general and administrative	6,557		12,820
Total operating expenses	6,557		12,820
Operating loss	(11,222)		(13,385)
Interest expense	(805)		(1,580)
Other income, net	140		398
Net Loss before income taxes	(11,887)		(14,567)
Income tax benefit	(2,378)		(2,965)
Net loss	(9,509)		(11,602)
Comprehensive loss	$ (9,509)		$ (11,602)
Net loss per share:
Basic	$ (0.15)		$ (0.18)
Diluted	$ (0.15)		$ (0.18)
Weighted average common shares outstanding:
Basic	63,149		62,994
Diluted	63,149		62,994
Revision of Prior Period, Adjustment [Member]
Revenues	$ 0		$ 0
Cost of revenues	0		0
Gross loss	0		0
Operating expenses:
Selling, general and administrative	0		0
Total operating expenses	0		0
Operating loss	0		0
Interest expense	(22)		(72)
Other income, net	0		0
Net Loss before income taxes	(22)		(72)
Income tax benefit	(10)		(31)
Net loss	(12)		(41)
Comprehensive loss	$ (12)		$ (41)
Net loss per share:
Basic	$ 0		$ 0
Diluted	$ 0		$ 0
Weighted average common shares outstanding:
Basic	0		0
Diluted	0		0