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Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Adoption of Accounting Standards Update ("ASU") 2020-06
Common stock
Additional paid-in capital
Additional paid-in capital
Adoption of Accounting Standards Update ("ASU") 2020-06
Accumulated other comprehensive income (loss)
Retained earnings (accumulated deficit)
Retained earnings (accumulated deficit)
Adoption of Accounting Standards Update ("ASU") 2020-06
Beginning balance (in shares) at Jul. 31, 2021     83,194,157          
Beginning balance at Jul. 31, 2021 $ 1,544,894   $ 8 $ 1,617,204   $ (6,218) $ (66,100)  
Net loss (51,276)           (51,276)  
Issuance of common stock upon exercise of stock options (in shares)     1,518          
Issuance of common stock upon exercise of stock options 17     17        
Issuance of common stock upon vesting of RSUs (in shares)     335,653          
Stock-based compensation 32,533     32,533        
Repurchase and retirement of common stock (in shares)     (226,172)          
Repurchase and retirement of common stock (26,262)           (26,262)  
Foreign currency translation adjustment (724)         (724)    
Unrealized gain (loss) on available-for-sale securities, net of tax (868)         (868)    
Reclassification adjustment for realized gain (loss) on available-for-sale securities, included in net income (loss) 69         69    
Ending balance (in shares) at Oct. 31, 2021     83,305,156          
Ending balance at Oct. 31, 2021 1,498,383   $ 8 1,649,754   (7,741) (143,638)  
Beginning balance (in shares) at Jul. 31, 2021     83,194,157          
Beginning balance at Jul. 31, 2021 1,544,894   $ 8 1,617,204   (6,218) (66,100)  
Ending balance (in shares) at Jul. 31, 2022     84,084,209          
Ending balance at Jul. 31, 2022 1,451,657 $ (28,309) $ 8 1,755,476 $ (68,003) (19,845) (283,982) $ 39,694
Net loss (69,318)           (69,318)  
Issuance of common stock upon vesting of RSUs (in shares)     373,380          
Stock-based compensation $ 35,249     35,249        
Repurchase and retirement of common stock (in shares) (226,172)   (2,581,478)          
Repurchase and retirement of common stock $ (200,000)     (40,000)     (160,000)  
Foreign currency translation adjustment (2,701)         (2,701)    
Unrealized gain (loss) on available-for-sale securities, net of tax (1,201)         (1,201)    
Reclassification adjustment for realized gain (loss) on available-for-sale securities, included in net income (loss) $ (216)         (216)    
Accounting Standards Update [Extensible Enumeration] Accounting Standards Update 2020-06 [Member]              
Ending balance (in shares) at Oct. 31, 2022     81,876,111          
Ending balance at Oct. 31, 2022 $ 1,185,161   $ 8 $ 1,682,722   $ (23,963) $ (473,606)