STOCKHOLDERS' EQUITY - Additional Information (Detail) $ / shares in Units, $ in Thousands			12 Months Ended
	Dec. 15, 2017 USD ($) d $ / shares shares	Mar. 12, 2013 USD ($) $ / shares shares	Jul. 31, 2020 USD ($) $ / shares shares	Jul. 31, 2019 USD ($) $ / shares shares
Equity [Line Items]
Preferred stock, shares issued (in shares) | shares			0	0
Preferred stock, par value (in usd per share)			$ 0.01	$ 0.01
Price per share (in usd per share)		$ 4.00
Common stock, par value (in usd per share)			$ 0.01	$ 0.01
Percentage of declared dividends	100.00%
Issuance of common stock (in shares) | shares		7,500,000
Proceeds from issuance of common stock, gross | $		$ 30,000
Common stock issuance, transaction cost | $		2,300
Net proceeds from issuance of common stock | $		$ 27,700	$ 19	$ 15
Issuance of warrants to acquire additional shares (in shares) | shares		2,000,000
Issuance of warrants to acquire additional shares, exercise price (in usd per share)		$ 5.00
Warrants expiration term		5 years
Series C Convertible Preferred Stock
Equity [Line Items]
Common stock, par value (in usd per share)	$ 0.01
Convertible preferred stock conversion price per share (in usd per share)	$ 1.96
Preferred stock, dividend rate, percentage	6.00%
Percentage threshold closing sale price of common stock higher than conversion price	170.00%
Series C Convertible Preferred Stock | Minimum
Equity [Line Items]
Trading days | d	5
Purchase Agreement | SPHG Holdings | Series C Convertible Preferred Stock
Equity [Line Items]
Preferred stock, shares issued (in shares) | shares	35,000
Preferred stock, par value (in usd per share)	$ 0.01
Price per share (in usd per share)	$ 1,000
Proceeds from issuance of preferred stock | $	$ 35,000
Percentage of stated value	100.00%
Repurchase Agreements | Warrant | Steel Holdings
Equity [Line Items]
Repurchase price of warrant (in usd per share)	$ 100