EARNINGS (LOSS) PER SHARE - Reconciliation of Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Net loss	$ (5,284)	$ (66,727)
Less: Preferred dividends on redeemable preferred stock	(2,129)	(2,129)
Net loss attributable to common stockholders	(7,413)	(68,856)
Effect of dilutive securities:
Net loss attributable to common stockholders after assumed conversions	$ (7,413)	$ (68,856)
Weighted average common shares outstanding (in shares)	61,644	61,180
Weighted average common equivalent shares arising from dilutive stock options, restricted stock, convertible notes and convertible preferred stock (in shares)	0	0
Weighted average number of common and potential common shares (in shares)	61,644	61,180
Basic and diluted net loss per share attributable to common stockholders (in usd per share)	$ (0.12)	$ (1.13)
Convertible Senior Unsecured Note
Effect of dilutive securities:
Dilutive securities	$ 0	$ 0
Contingent Convertible Preferred Stock
Effect of dilutive securities:
Dilutive securities	$ 0	$ 0