CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Condensed Income Statements, Captions [Line Items]
Revenues	$ 169,934	$ 225,153
Cost of revenue	129,466	180,907
Gross profit	40,468	44,246
Operating expenses:
Selling, general and administrative	26,858	22,227
Amortization of intangible assets	6,535	7,277
Total operating expenses	33,393	29,504
Operating income	7,075	14,742
Other income (expense):
Interest income	20	16
Interest expense	(7,823)	(9,169)
Other (losses) gains, net	(2,019)	558
Total other expense	(9,822)	(8,595)
(Loss) income before income taxes	(2,747)	6,147
Income tax expense	804	1,355
Net (loss) income	(3,551)	4,792
Less: Preferred dividends on redeemable preferred stock	(537)	(536)
Net (loss) income attributable to common stockholders	$ (4,088)	$ 4,256
Basic net (loss) earnings per share attributable to common stockholders (in usd per share)	$ (0.07)	$ 0.07
Diluted net (loss) earnings per share attributable to common stockholders (in usd per share)	$ (0.07)	$ 0.06
Weighted average common shares used in:
Basic (loss) earnings per share (in shares)	61,893	61,401
Diluted (loss) earnings per share (in shares)	61,893	86,006
Products
Condensed Income Statements, Captions [Line Items]
Revenues	$ 105,708	$ 133,003
Services
Condensed Income Statements, Captions [Line Items]
Revenues	$ 64,226	$ 92,150