CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Income Statement [Abstract]
Net revenue	$ 51,548	$ 49,434	$ 150,223	$ 178,552
Cost of revenue	42,303	39,531	120,672	139,262
Gross profit	9,245	9,903	29,551	39,290
Operating expenses:
Selling, general and administrative	9,214	12,417	28,899	36,754
Total operating expenses	9,214	12,417	28,899	36,754
Operating income (loss)	31	(2,514)	652	2,536
Other income (expense):
Interest income	3	1	9	10
Interest expense	(848)	(619)	(2,359)	(1,913)
Other gains (losses), net	2,151	153	1,605	(3,990)
Total other income (expense), net	1,306	(465)	(745)	(5,893)
Income (loss) from continuing operations before income taxes	1,337	(2,979)	(93)	(3,357)
Income tax expense	11,032	6,315	12,070	8,124
Loss from continuing operations, after income taxes	(9,695)	(9,294)	(12,163)	(11,481)
Income (loss) from discontinued operations, net of tax	39,895	(18,335)	(108)	(21,895)
Net income (loss)	30,200	(27,629)	(12,271)	(33,376)
Less: Preferred dividends on redeemable preferred stock	(537)	(519)	(1,611)	(1,586)
Net income (loss) attributable to common stockholders	$ 29,663	$ (28,148)	$ (13,882)	$ (34,962)
Basic and diluted net income (loss) per share attributable to common stockholders:
Continuing operations (in usd per share)	$ (0.17)	$ (0.16)	$ (0.23)	$ (0.21)
Discontinued operations (in usd per share)	0.67	(0.29)	0	(0.35)
Total income (loss) per share (in usd per share)	$ 0.50	$ (0.45)	$ (0.23)	$ (0.56)
Weighted average common shares used in:
Basic (loss) per share (in shares)	59,853	62,263	59,961	61,898
Diluted (loss) per share (in shares)	59,853	62,263	59,961	61,898