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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' 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 Other Comprehensive Income (Loss)
Retained Earnings (Accumulated Deficit)
Retained Earnings (Accumulated Deficit)
Cumulative Effect, Period of Adoption, Adjustment
Treasury Stock
Beginning balance (in shares) at Dec. 31, 2020     85,895            
Beginning balance at Dec. 31, 2020 $ 619,600   $ 859 $ 1,229,320   $ (278) $ (589,178)   $ (21,123)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Stock-based compensation expense 11,754     11,754          
Exercise of stock options (in shares)     1,142            
Exercise of stock options 11,566   $ 11 11,555          
Restricted stock units vested, net of shares withheld for taxes (in shares)     419            
Restricted stock units vested, net of shares withheld for taxes (3,397)   $ 4 (3,401)          
Foreign currency translation adjustment (85)         (85)      
Net income (loss) (31,954)           (31,954)    
Ending balance (in shares) at Sep. 30, 2021     87,456            
Ending balance at Sep. 30, 2021 607,484   $ 874 1,249,228   (363) (621,132)   (21,123)
Beginning balance (in shares) at Dec. 31, 2020     85,895            
Beginning balance at Dec. 31, 2020 619,600   $ 859 1,229,320   (278) (589,178)   (21,123)
Ending balance (in shares) at Dec. 31, 2021     90,759            
Ending balance at Dec. 31, 2021 $ 693,633 $ (66,383) $ 908 1,340,989 $ (106,172) (362) (626,779) $ 39,789 (21,123)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Accounting Standards Update [Extensible Enumeration] Accounting Standards Update 2020-06                
Beginning balance (in shares) at Jun. 30, 2021     87,195            
Beginning balance at Jun. 30, 2021 $ 614,190   $ 872 1,242,900   (367) (608,092)   (21,123)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Stock-based compensation expense 4,395     4,395          
Exercise of stock options (in shares)     242            
Exercise of stock options 2,190   $ 2 2,188          
Restricted stock units vested, net of shares withheld for taxes (in shares)     19            
Restricted stock units vested, net of shares withheld for taxes (255)   $ 0 (255)          
Foreign currency translation adjustment 4         4      
Net income (loss) (13,040)           (13,040)    
Ending balance (in shares) at Sep. 30, 2021     87,456            
Ending balance at Sep. 30, 2021 607,484   $ 874 1,249,228   (363) (621,132)   (21,123)
Beginning balance (in shares) at Dec. 31, 2021     90,759            
Beginning balance at Dec. 31, 2021 693,633 $ (66,383) $ 908 1,340,989 $ (106,172) (362) (626,779) $ 39,789 (21,123)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Stock-based compensation expense 19,350     19,350          
Exercise of stock options (in shares)     354            
Exercise of stock options 3,280   $ 3 3,277          
Restricted stock units vested, net of shares withheld for taxes (in shares)     452            
Restricted stock units vested, net of shares withheld for taxes (6,187)   $ 5 (6,192)          
Exchange/conversion (in shares)     5,394            
Exchange/conversion 101,999   $ 54 101,945          
Shares issued for acquisition (in shares)     3,742            
Shares issued for acquisition 130,175   $ 37 130,138          
Leveraged stock units vested, net of shares withheld for taxes (in shares)     459            
Leveraged stock units vested, net of shares withheld for taxes (11,232)   $ 5 (11,237)          
Foreign currency translation adjustment (682)         (682)      
Net income (loss) (7,815)           (7,815)    
Ending balance (in shares) at Sep. 30, 2022     101,160            
Ending balance at Sep. 30, 2022 856,138   $ 1,012 1,472,098   (1,044) (594,805)   (21,123)
Beginning balance (in shares) at Jun. 30, 2022     91,657            
Beginning balance at Jun. 30, 2022 613,088   $ 916 1,231,005   (782) (596,928)   (21,123)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Stock-based compensation expense 6,992     6,992          
Exercise of stock options (in shares)     317            
Exercise of stock options 2,971   $ 4 2,967          
Restricted stock units vested, net of shares withheld for taxes (in shares)     50            
Restricted stock units vested, net of shares withheld for taxes (948)   $ 1 (949)          
Exchange/conversion (in shares)     5,394            
Exchange/conversion 101,999   $ 54 101,945          
Shares issued for acquisition (in shares)     3,742            
Shares issued for acquisition 130,175   $ 37 130,138          
Foreign currency translation adjustment (262)         (262)      
Net income (loss) 2,123           2,123    
Ending balance (in shares) at Sep. 30, 2022     101,160            
Ending balance at Sep. 30, 2022 $ 856,138   $ 1,012 $ 1,472,098   $ (1,044) $ (594,805)   $ (21,123)