LOSS PER SHARE - Reconciliation of (Loss) Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Earnings Per Share [Abstract]
Net loss	$ (19,494)	$ (3,551)
Less: Preferred dividends on redeemable preferred stock	(537)	(537)
Net loss attributable to common stockholders	$ (20,031)	$ (4,088)
Weighted average common shares outstanding (in shares)	60,307	61,893
Basic net loss per share attributable to common stockholders (in usd per share)	$ (0.33)	$ (0.07)
Diluted net loss per share attributable to common stockholders (in usd per share)	$ (0.33)	$ (0.07)