EARNINGS (LOSS) PER SHARE - Reconciliation of Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ (3,557)	$ (11,753)	$ 1,235	$ (19,118)
Less: Preferred dividends on redeemable preferred stock	(531)	(536)	(1,067)	(1,073)
Net income (loss) attributable to common stockholders	$ (4,088)	$ (12,289)	$ 168	$ (20,191)
Weighted average common shares outstanding (in shares)	61,538	60,935	61,469	60,974
Weighted average common equivalent shares arising from restricted stock	0	0	13	0
Weighted average number of common and potential common shares (in shares)	$ 61,538,000	$ 60,935,000	$ 61,482,000	$ 60,974,000
Basic net earnings (loss) per share attributable to common stockholders	(0.07)	(0.20)	0.00	(0.33)
Diluted net earnings (loss) per share attributable to common stockholders	$ (0.07)	$ (0.20)	$ 0.00	$ (0.33)