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CONDENSED CONSOLIDATED BALANCE SHEETS (parenthetical) - USD ($)
$ in Thousands
Oct. 31, 2020
Jul. 31, 2020
Statement of Financial Position [Abstract]    
Accounts receivable, allowance for credit loss $ 896 $ 804
Preferred stock, par value (in dollars per share) $ 0.000025 $ 0.000025
Preferred stock, shares authorized (in shares) 200,000,000 200,000,000
Preferred stock, shares issued (in shares)   0
Preferred stock, shares outstanding (in shares) 0  
Common stock, par value (in dollars per share) $ 0.000025 $ 0.000025
Common stock, shares authorized (in shares) 1,200,000,000 1,200,000,000
Common stock, shares issued (in shares) 201,346,000 201,949,000
Common stock, shares outstanding (in shares) 201,346,000 201,949,000
Common Class A    
Common stock, shares authorized (in shares) 1,000,000,000 1,000,000,000
Common stock, shares issued (in shares) 189,883,000 186,846,000
Common stock, shares outstanding (in shares) 189,883,000 186,846,000
Common Class B    
Common stock, shares authorized (in shares) 200,000,000 200,000,000
Common stock, shares issued (in shares) 11,463,000 15,103,000
Common stock, shares outstanding (in shares) 11,463,000 15,103,000