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RELATED PARTY TRANSACTIONS (Detail) - USD ($)		3 Months Ended		9 Months Ended
RELATED PARTY TRANSACTIONS (Detail) - USD ($)	Dec. 15, 2017	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020	Jul. 31, 2020	Feb. 28, 2019
Related Party Transaction [Line Items]
Long-term debt		$ 374,200,000		$ 374,200,000		$ 379,049,000
Preferred stock, shares issued (in shares)		0		0		0
SPHG Holdings \| 7.50% Convertible Senior Note due March 1, 2024
Related Party Transaction [Line Items]
Principal amount convertible senior notes held of		$ 14,940,000		$ 14,940,000		$ 14,940,000	$ 14,900,000
Long-term debt		8,984,000		8,984,000		8,054,000
Steel Holdings \| Convertible debt
Related Party Transaction [Line Items]
Principal amount convertible senior notes held of		14,900,000		14,900,000		14,900,000	$ 14,900,000
SPHG Holdings \| Purchase agreement \| Series C convertible preferred stock
Related Party Transaction [Line Items]
Preferred stock, shares issued (in shares)	35,000
Price per share (in usd per share)	$ 1,000
Proceeds from issuance of preferred stock	$ 35,000,000.0
Steel Services Ltd. \| Management Services Agreement
Related Party Transaction [Line Items]
Total expenses incurred related to Management Services Agreement and Transfer Agreement		1,000,000.0	$ 900,000	3,500,000	$ 2,600,000
SP Corporate Services Llc and Steel Services Limited \| Management Services Agreement
Related Party Transaction [Line Items]
Amount due to related parties		$ 1,400,000		$ 1,400,000		$ 800,000
Steel Connect, Inc. \| SPHG Holdings
Related Party Transaction [Line Items]
Ownership percentage in capital stock		54.80%		54.80%