Balance Sheet Components (Details 5) - USD ($) $ in Thousands	9 Months Ended
	Apr. 30, 2020	Jul. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Cost	$ 140,700	$ 140,700
Accumulated Amortization	94,669	74,158
Net Book Value	46,031	66,542
Acquired technology
Finite-Lived Intangible Assets [Line Items]
Cost	93,600	93,600
Accumulated Amortization	68,664	53,970
Net Book Value	24,936	39,630
Customer contracts and related relationships
Finite-Lived Intangible Assets [Line Items]
Cost	35,700	35,700
Accumulated Amortization	17,016	12,566
Net Book Value	18,684	23,134
Partner relationships
Finite-Lived Intangible Assets [Line Items]
Cost	200	200
Accumulated Amortization	91	74
Net Book Value	109	126
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost	2,500	2,500
Accumulated Amortization	893	625
Net Book Value	1,607	1,875
Order backlog
Finite-Lived Intangible Assets [Line Items]
Cost	8,700	8,700
Accumulated Amortization	8,005	6,923
Net Book Value	$ 695	$ 1,777
Weighted Average
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	2 years 9 months 18 days
Weighted Average | Acquired technology
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	1 year 9 months 18 days
Weighted Average | Customer contracts and related relationships
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	4 years
Weighted Average | Partner relationships
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	4 years 10 months 24 days
Weighted Average | Trademarks
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	4 years 6 months
Weighted Average | Order backlog
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	9 months 18 days