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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Additional Paid-In Capital
Additional Paid-In Capital
Cumulative Effect, Period of Adoption, Adjustment
Accumulated deficit
Accumulated deficit
Cumulative Effect, Period of Adoption, Adjustment
Accumulated other comprehensive income (loss)
Balance, beginning of period (in shares) at Dec. 31, 2018     107,035          
Balance, beginning of period at Dec. 31, 2018 $ 7,776 $ 0 $ 1 $ 353,335 $ 27 $ (346,302) $ (27) $ 742
Issuance of common stock from exercise of equity awards and employee stock purchase plan (in shares)     5,273          
Issuance of common stock from exercise of equity awards and employee stock purchase plan 4,985     4,985        
Payment of withholding taxes related to net share settlement of equity awards (8,198)     (8,198)        
Conversion of convertible notes due 2023, net (in shares)     10,801          
Settlement of convertible senior notes 58,857     58,857        
Cost of convertible notes hedge related to the convertible senior notes, net (36,313)     (36,313)        
Sale of warrants related to the convertible senior notes 29,818     29,818        
Equity component of settlement of convertible senior notes, net 35,387     35,387        
Stock-based compensation 20,417     20,417        
Net income 161,148         161,148    
Foreign currency translation adjustments (1,665)             (1,665)
Change in net unrealized loss on marketable securities, net of tax 0              
Balance, ending of period (in shares) at Dec. 31, 2019     123,109          
Balance, end of period at Dec. 31, 2019 272,212   $ 1 458,315   (185,181)   (923)
Issuance of common stock from exercise of equity awards and employee stock purchase plan (in shares)     4,002          
Issuance of common stock from exercise of equity awards and employee stock purchase plan 8,395     8,395        
Payment of withholding taxes related to net share settlement of equity awards (68,330)     (68,330)        
Conversion of convertible notes due 2023, net (in shares)     1,851          
Settlement of convertible senior notes 301,015     301,015        
Equity component of convertible senior notes, net 116,502     116,502        
Cost of convertible notes hedge related to the convertible senior notes, net (117,108)     (117,108)        
Sale of warrants related to the convertible senior notes 96,351     96,351        
Equity component of settlement of convertible senior notes, net (306,220)     (306,220)        
Exercise of convertible notes hedge related to the convertible senior notes (in shares)     (1,851)          
Exercise of warrants related to convertible senior notes (in shares)     1,851          
Change in fair value of common stock related to acquisition 3,321     3,321        
Stock-based compensation 42,503     42,503        
Net income 133,995         133,995    
Foreign currency translation adjustments 1,357             1,357
Change in net unrealized loss on marketable securities, net of tax $ 0              
Balance, ending of period (in shares) at Dec. 31, 2020 128,962   128,962          
Balance, end of period at Dec. 31, 2020 $ 483,993   $ 1 534,744   (51,186)   434
Issuance of common stock from exercise of equity awards and employee stock purchase plan (in shares)     2,808          
Issuance of common stock from exercise of equity awards and employee stock purchase plan 7,484     7,484        
Payment of withholding taxes related to net share settlement of equity awards (in shares)     0          
Payment of withholding taxes related to net share settlement of equity awards (29,136)     (29,136)        
Equity component of convertible senior notes, net 207,970     207,970        
Cost of convertible notes hedge related to the convertible senior notes, net (213,322)     (213,322)        
Sale of warrants related to the convertible senior notes 220,800     220,800        
Equity component of settlement of convertible senior notes, net (976,714)     (976,714)        
Settlement of convertible senior notes (in shares)     5,489          
Settlement of convertible senior notes 972,273     972,273        
Exercise of convertible notes hedge related to the convertible senior notes (in shares)     (5,721)          
Exercise of warrants related to convertible senior notes (in shares)     5,582          
Stock-based compensation 113,825     113,825        
Net income 145,449         145,449    
Repurchase of common stock (in shares)     (3,226)          
Repurchase of common stock (500,000)         (500,000)    
Foreign currency translation adjustments (334)             (334)
Change in net unrealized loss on marketable securities, net of tax $ (2,120)             (2,120)
Balance, ending of period (in shares) at Dec. 31, 2021 133,894   133,894          
Balance, end of period at Dec. 31, 2021 $ 430,168   $ 1 $ 837,924   $ (405,737)   $ (2,020)