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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Additional Paid-In Capital
Cumulative Effect, Period of Adoption, Adjustment
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Accumulated Deficit
Cumulative Effect, Period of Adoption, Adjustment
Balance (in shares) at Jan. 31, 2020   231,708            
Balance at Jan. 31, 2020   $ 231 $ 5,090,187   $ 0 $ 23,492 $ (2,627,359) $ (200)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes   7 78,160          
Share-based compensation     746,643          
Settlement of warrants     (34,118)   34,118      
Exercise of convertible senior notes hedges     303,202   (303,201)      
Settlement of convertible senior notes   $ 2 (4)          
Other comprehensive income (loss) $ (22,382)         (22,382)    
Net income (loss) (210,724)           (210,724)  
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes (in shares)   7,390            
Settlement of warrants (shares)   186            
Settlement of convertible senior notes (in shares)   1,654            
Purchase of treasury stock from the exercise of convertible senior notes hedges (in shares)   (1,655)            
Balance (in shares) at Oct. 31, 2020   239,283            
Balance at Oct. 31, 2020 3,078,054 $ 240 6,184,070   (269,083) 1,110 (2,838,283)  
Balance (in shares) at Jul. 31, 2020   237,161            
Balance at Jul. 31, 2020   $ 238 5,954,738   (303,201) 646 (2,813,943)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes   $ 2 3,648          
Share-based compensation     259,802          
Settlement of warrants     (34,118)   34,118      
Other comprehensive income (loss) 464         464    
Net income (loss) (24,340)           (24,340)  
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes (in shares)   1,936            
Settlement of warrants (shares)   186            
Balance (in shares) at Oct. 31, 2020   239,283            
Balance at Oct. 31, 2020 3,078,054 $ 240 6,184,070   (269,083) 1,110 (2,838,283)  
Balance (in shares) at Jan. 31, 2021   242,667            
Balance at Jan. 31, 2021 3,277,834 $ 242 6,254,936 $ (219,702) (12,384) (54,970) (2,909,990) $ 136,032
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes   $ 7 76,374          
Share-based compensation     808,299          
Exercise of convertible senior notes hedges     58   (53)      
Settlement of convertible senior notes     (2)          
Other comprehensive income (loss) 34,343         34,343    
Net income (loss) 102,626           102,626  
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes (in shares)   6,767            
Issuance of restricted stock awards (in shares)   125            
Balance (in shares) at Oct. 31, 2021   249,559            
Balance at Oct. 31, 2021 4,215,816 $ 249 6,919,963   (12,437) (20,627) (2,671,332)  
Balance (in shares) at Jul. 31, 2021   248,087            
Balance at Jul. 31, 2021   $ 248 6,639,067   (12,431) (44,150) (2,714,744)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes   $ 1 1,893          
Share-based compensation     278,995          
Exercise of convertible senior notes hedges     8   (6)      
Other comprehensive income (loss) 23,523         23,523    
Net income (loss) 43,412           43,412  
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes (in shares)   1,429            
Issuance of restricted stock awards (in shares)   43            
Balance (in shares) at Oct. 31, 2021   249,559            
Balance at Oct. 31, 2021 $ 4,215,816 $ 249 $ 6,919,963   $ (12,437) $ (20,627) $ (2,671,332)