(LOSS) EARNINGS 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, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Schedule of Earnings per Share Basic and Diluted [Line Items]
Net (loss) income	$ (2,196)	$ (3,557)	$ (5,747)	$ 1,235
Less: Preferred dividends on redeemable preferred stock	(530)	(531)	(1,067)	(1,067)
Net (loss) income attributable to common stockholders	(2,726)	(4,088)	(6,814)	168
Effect of dilutive securities
Net (loss) income attributable to common stockholders after assumed conversions	$ (2,726)	$ (4,088)	$ (6,814)	$ 168
Weighted average common shares outstanding (in shares)	62,028	61,538	61,961	61,469
Weighted average common equivalent shares arising from restricted stock (in shares)	0	0	0	13
Weighted average number of common and potential common shares (in usd per share)	62,028	61,538	61,961	61,482
Basic net (loss) income per share attributable to common stockholders (in usd per share)	$ (0.04)	$ (0.07)	$ (0.11)	$ 0.00
Diluted net (loss) income per share attributable to common stockholders (in usd per share)	$ (0.04)	$ (0.07)	$ (0.11)	$ 0.00
Convertible Senior Unsecured Note
Effect of dilutive securities
Dilutive securities	$ 0	$ 0	$ 0	$ 0
Contingent Redeemable Preferred Stock
Effect of dilutive securities
Dilutive securities	$ 0	$ 0	$ 0	$ 0