SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Aug. 01, 2019
Significant Of Accounting Policies [Line Items]
Highly liquid investment period to be considered cash equivalent	3 months
Work In Process Inventory | IWCO
Significant Of Accounting Policies [Line Items]
Fair value of assets acquired		$ 7.2
5.25% Convertible Senior Notes
Significant Of Accounting Policies [Line Items]
Common stock equivalent shares excluded from the denominator in calculation of diluted earnings (loss)per share	17.9	2.6
Ten Largest Clients | Sales Revenue, Net | Customer Concentration Risk
Significant Of Accounting Policies [Line Items]
Concentration risk percentage	49.00%	44.00%
Computing Market Client | Net Accounts Receivable | Customer Concentration Risk
Significant Of Accounting Policies [Line Items]
Concentration risk percentage		13.00%
Stock Options And Restricted Stock
Significant Of Accounting Policies [Line Items]
Common stock equivalent shares excluded from the denominator in calculation of diluted earnings (loss)per share	20.9	0.5
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 Customer | Sales Revenue, Net | Customer Concentration Risk
Significant Of Accounting Policies [Line Items]
Concentration risk percentage	11.00%
Accounting Standards Update 2016-02 | Pro Forma
Significant Of Accounting Policies [Line Items]
ROU asset			$ 53.7
Lease liability			$ 55.3