CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Income Statement [Abstract]
Net revenue	$ 51,359	$ 44,354
Cost of revenue	37,094	34,948
Gross profit	14,265	9,406
Operating expenses:
Selling, general and administrative	10,386	8,835
Total operating expenses	10,386	8,835
Operating income	3,879	571
Other income (expense):
Interest income	144	3
Interest expense	(826)	(761)
Other gains (losses), net	2,886	(481)
Total other income (expense), net	2,204	(1,239)
Income (loss) from continuing operations before income taxes	6,083	(668)
Income tax expense	1,126	315
Net income (loss) from continuing operations	4,957	(983)
Net loss from discontinued operations	0	(18,511)
Net income (loss)	4,957	(19,494)
Less: Preferred dividends on redeemable preferred stock	(537)	(537)
Net income (loss) attributable to common stockholders	$ 4,420	$ (20,031)
Net income (loss) per common shares - basic
Continuing operations, basic (in usd per share)	$ 0.07	$ (0.02)
Discontinued operations, basic (in usd per share)	0	(0.31)
Basic net income (loss) per share attributable to common stockholders (in usd per share)	0.07	(0.33)
Net income (loss) per common shares - diluted
Continuing operations, diluted (in usd per share)	0.06	(0.02)
Discontinued operations, diluted (in usd per share)	0	(0.31)
Diluted net income (loss) per share attributable to common stockholders (in usd per share)	$ 0.06	$ (0.33)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted average common shares outstanding, basic (in shares)	60,050	60,307
Weighted average common shares outstanding, diluted (in shares)	78,430	60,307