EARNINGS (LOSS) PER SHARE - Reconciliation of Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ 4,792	$ (7,365)
Less: Preferred dividends on redeemable preferred stock	(536)	(536)
Net income (loss) attributable to common stockholders	4,256	(7,901)
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities	592	0
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units	536	0
Net Income (Loss) Attributable to Parent, Diluted	$ 5,384	$ (7,901)
Weighted average common shares outstanding (in shares)	61,401	60,712
Weighted average common equivalent shares arising from dilutive stock options, restricted stock, convertible notes and convertible preferred stock (in shares)	24,605	0
Weighted average number of common and potential common shares (in shares)	$ 86,006,000	$ 60,712,000
Basic net earnings (loss) per share attributable to common stockholders	0.07	(0.13)
Diluted net earnings (loss) per share attributable to common stockholders	$ 0.06	$ (0.13)