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RELATED PARTY TRANSACTIONS (Detail) - USD ($)
3 Months Ended
Dec. 15, 2017
Oct. 31, 2020
Oct. 31, 2019
Jul. 31, 2020
Feb. 28, 2019
Related Party Transaction [Line Items]          
Long-term debt   $ 377,955,000   $ 379,049,000  
Preferred stock, shares issued (in shares)   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 $ 14,900,000
Long-term debt   8,346,000   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
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   800,000 $ 900,000    
SP Corporate Services Llc and Steel Services Limited | Management Services Agreement          
Related Party Transaction [Line Items]          
Amount due to related parties   $ 2,300,000   $ 800,000  
Steel Connect, Inc. | SPHG Holdings          
Related Party Transaction [Line Items]          
Ownership percentage in capital stock   54.80%