LOSS PER SHARE - Reconciliation of (Loss) Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Earnings Per Share [Abstract]
Net loss	$ (22,977)	$ (2,196)	$ (42,471)	$ (5,747)
Less: Preferred dividends on redeemable preferred stock	(537)	(530)	(1,074)	(1,067)
Net loss attributable to common stockholders	$ (23,514)	$ (2,726)	$ (43,545)	$ (6,814)
Weighted average common shares used in basic loss per share (in shares)	59,748	62,028	60,027	61,961
Weighted average common shared used in diluted loss per share (in shares)	59,748	62,028	60,027	61,961
Basic net loss per share attributable to common stockholders (in usd per share)	$ (0.39)	$ (0.04)	$ (0.73)	$ (0.11)
Diluted net loss per share attributable to common stockholders (in usd per share)	$ (0.39)	$ (0.04)	$ (0.73)	$ (0.11)