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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
Accumulated deficit
Accumulated deficit
Cumulative effect, period of adoption, adjustment
Accumulated other comprehensive gain (loss)
Balance (in shares) at Dec. 31, 2018     109,018        
Balance at Dec. 31, 2018 $ 1,012,112   $ 109 $ 1,226,588 $ (204,294)   $ (10,291)
Increase (Decrease) in Stockholders' Equity              
Net income (loss) (85,964)       (85,964)    
Foreign currency translation adjustment 10,145           10,145
Unrealized gain (loss) on marketable securities, net of tax 54           54
Issuance of common stock upon exercise of options, equity stock and stock units, and employee stock purchase plan (in shares)     3,113        
Issuance of common stock upon exercise of options, equity stock and employee stock purchase plan 8,081   $ 3 8,078      
Stock-based compensation 26,476     26,476      
Balance (in shares) at Dec. 31, 2019     112,131        
Balance at Dec. 31, 2019 975,373   $ 112 1,261,142 (285,789)   (92)
Balance (Accounting Standards Update 2016-02) at Dec. 31, 2019   $ 4,469       $ 4,469  
Increase (Decrease) in Stockholders' Equity              
Net income (loss) (40,471)       (40,471)    
Foreign currency translation adjustment 24           24
Unrealized gain (loss) on marketable securities, net of tax (13)           (13)
Issuance of common stock upon exercise of options, equity stock and stock units, and employee stock purchase plan (in shares)     2,183        
Issuance of common stock upon exercise of options, equity stock and employee stock purchase plan 2,084   $ 3 2,081      
Repurchase and retirement of common stock under repurchase plan, shares     (2,616)        
Repurchase and retirement of common stock under repurchase plan, value (50,069)   $ (3) (18,575) (31,491)    
Stock-based compensation 25,778     25,778      
Balance (in shares) at Dec. 31, 2020     111,698        
Balance at Dec. 31, 2020 912,706   $ 112 1,270,426 (357,751)   (81)
Increase (Decrease) in Stockholders' Equity              
Net income (loss) 18,334       18,334    
Foreign currency translation adjustment (366)           (366)
Unrealized gain (loss) on marketable securities, net of tax (1,005)           (1,005)
Issuance of common stock upon exercise of options, equity stock and stock units, and employee stock purchase plan (in shares)     1,745        
Issuance of common stock upon exercise of options, equity stock and employee stock purchase plan (1,656)   $ 1 (1,657)      
Stock Issued During Period, Value, Acquisitions 6,978     6,978      
Stock Issued During Period, Shares, Acquisitions     300        
Repurchase and retirement of common stock under repurchase plan, shares     (4,451)        
Repurchase and retirement of common stock under repurchase plan, value (100,081)   $ (4) (4,267) (95,810)    
Stock-based compensation 27,486     27,486      
Balance (in shares) at Dec. 31, 2021     109,292        
Balance at Dec. 31, 2021 $ 862,396   $ 109 $ 1,298,966 $ (435,227)   $ (1,452)