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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Apr. 30, 2021	Oct. 31, 2019	Jul. 31, 2021	Jul. 31, 2020
Significant Of Accounting Policies [Line Items]
Highly liquid investment period to be considered cash equivalent			3 months
Impairment of goodwill	$ 25,700,000		$ 25,658,000	$ 0
Other assets and liabilities			(19,839,000)	(10,481,000)
Non-cash lease expense			14,186,000	$ 14,263,000
Revision of Prior Period, Reclassification, Adjustment \| Reclassification Adjustment to Confirm with Current Reporting
Significant Of Accounting Policies [Line Items]
Other assets and liabilities			14,300,000
Non-cash lease expense			$ 14,300,000
Ten Largest Clients \| Sales Revenue, Net \| Customer Concentration Risk
Significant Of Accounting Policies [Line Items]
Concentration risk percentage			52.00%	57.00%
Minimum
Significant Of Accounting Policies [Line Items]
Highly liquid investment period to be considered short term investments			3 months
Maximum
Significant Of Accounting Policies [Line Items]
Highly liquid investment period to be considered short term investments			12 months
Supply Chain \| One Client \| Sales Revenue, Net \| Customer Concentration Risk
Significant Of Accounting Policies [Line Items]
Concentration risk percentage			16.00%	17.00%
Supply Chain \| Client One \| Net Accounts Receivable \| Customer Concentration Risk
Significant Of Accounting Policies [Line Items]
Concentration risk percentage			13.00%	9.00%
Supply Chain \| Client Two \| Net Accounts Receivable \| Customer Concentration Risk
Significant Of Accounting Policies [Line Items]
Concentration risk percentage			12.00%	11.00%
Direct Marketing \| One Client \| Sales Revenue, Net \| Customer Concentration Risk
Significant Of Accounting Policies [Line Items]
Concentration risk percentage			11.00%	8.00%
Adjustment of Tax Related Liabilities
Significant Of Accounting Policies [Line Items]
Adjustments of tax related liabilities		$ 6,400,000