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The Company and Summary of Significant Accounting Policies and Estimates (Tables)
12 Months Ended
Jul. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Estimated useful lives of property and equipment
The estimated useful lives of property and equipment are as follows:
Computer hardware
 
3 years
Purchased software
 
3 years
Furniture and fixtures
 
3 years
Leasehold improvements
 
Shorter of the lease term or estimated useful life