RELATED PARTY TRANSACTIONS - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Feb. 28, 2019
Related Party Transaction [Line Items]
Total debt, net	$ 10,968	$ 9,147
Preferred dividends paid	$ 2,129	2,129
Steel Holdings | 5.25% Convertible Senior Notes | SPHG Holdings, Steel Holdings, HNH And SPL
Related Party Transaction [Line Items]
Ownership percentage in capital stock	50.00%
SPHG Holdings | 7.50% Convertible Senior Note due March 1, 2024
Related Party Transaction [Line Items]
Debt instrument stated percentage			7.50%
Total debt, net	$ 11,047	9,343
Debt instrument, interest expense	2,840	2,426
SPHG Holdings | Net loss attributable to common stockholders:
Related Party Transaction [Line Items]
Debt instrument stated percentage			7.50%
Purchase Agreement | SPHG Holdings | Series C Convertible Preferred Stock
Related Party Transaction [Line Items]
Preferred dividends paid	2,100	2,100
SPHG Holdings
Related Party Transaction [Line Items]
Convertible notes payable	14,900	14,900
SPHG Holdings | Net loss attributable to common stockholders:
Related Party Transaction [Line Items]
Convertible notes payable, current			$ 14,900
Steel Services Ltd | Management Services Agreement
Related Party Transaction [Line Items]
Total expenses incurred related to Management Services Agreement and Transfer Agreement	3,100	4,300
SP Corporate Services Llc and Steel Services Limited | Management Services Agreement
Related Party Transaction [Line Items]
Amount due to related parties	$ 1,000	$ 900