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RELATED PARTY TRANSACTIONS (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Dec. 15, 2017	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019	Jul. 31, 2019	Feb. 28, 2019
Related Party Transaction [Line Items]
Long-term debt		$ 379,627		$ 379,627		$ 381,669
Preferred stock, shares issued (in shares)		0		0		0
SPHG Holdings \| Convertible Senior Note
Related Party Transaction [Line Items]
Long-term debt		$ 8,672		$ 8,672		$ 7,432
Steel Holdings \| 5.25% Convertible Senior Notes
Related Party Transaction [Line Items]
Principal amount convertible senior notes held of		14,900		14,900		14,900	$ 14,900
Debt instrument, stated interest rate							7.50%
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
Steel Services Ltd. \| Management Services Agreement
Related Party Transaction [Line Items]
Total expenses incurred related to Management Services Agreement and Transfer Agreement		900	$ 300	2,600	$ 1,000
SP Corporate Services Llc and Steel Services Limited \| Management Services Agreement
Related Party Transaction [Line Items]
Amount due to related parties		$ 300		$ 300		$ 500
Steel Connect, Inc. \| SPHG Holdings
Related Party Transaction [Line Items]
Ownership percentage in capital stock		55.90%		55.90%