Balance Sheet Components - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2021	Jul. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Cost	$ 156,400	$ 140,700
Accumulated Amortization	124,712	120,957
Net Book Value	31,688	19,743
Acquired technology
Finite-Lived Intangible Assets [Line Items]
Cost	103,300	93,600
Accumulated Amortization	88,311	86,367
Net Book Value	14,989	7,233
Customer contracts and related relationships
Finite-Lived Intangible Assets [Line Items]
Cost	40,800	35,700
Accumulated Amortization	26,122	24,432
Net Book Value	14,678	11,268
Partner relationships
Finite-Lived Intangible Assets [Line Items]
Cost	200	200
Accumulated Amortization	124	119
Net Book Value	76	81
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost	3,400	2,500
Accumulated Amortization	1,455	1,339
Net Book Value	1,945	1,161
Order backlog
Finite-Lived Intangible Assets [Line Items]
Cost	8,700	8,700
Accumulated Amortization	8,700	8,700
Net Book Value	$ 0	$ 0
Weighted Average
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	3 years 7 months 6 days
Weighted Average | Acquired technology
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	3 years 4 months 24 days
Weighted Average | Customer contracts and related relationships
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	3 years 9 months 18 days
Weighted Average | Partner relationships
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	3 years 4 months 24 days
Weighted Average | Trademarks
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	4 years 8 months 12 days
Weighted Average | Order backlog
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted-Average Useful Life (in years)	0 years