REVENUE RECOGNITION - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018	Aug. 01, 2018	Jul. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract assets	$ 22,400		$ 22,400		$ 24,000
Deferred revenue current	2,900		2,900		3,700
Deferred revenue long-term	100		100		200
Accumulated deficit	(7,387,774)		(7,387,774)		(7,357,431)	$ (7,363,569)
Net revenue	194,003	$ 193,921	615,359	$ 450,181
Difference between Revenue Guidance in Effect before and after Topic 606 \| Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accumulated deficit	6,936		6,936		$ 6,138
Net revenue	$ 2,489		$ 2,111

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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