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Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Total
Balance at Dec. 31, 2018 $ 563 $ 845,366 $ (971) $ (323,277) $ 521,681
Balance (in shares) at Dec. 31, 2018 56,279,542        
Increase (Decrease) in Stockholders' Equity          
Issuance of common stock upon exercise of stock awards $ 5 9,264     9,269
Issuance of common stock upon exercise of stock awards (in shares) 543,887        
Issuance of restricted stock units (in shares) 11,311        
Issuance of common stock under the Employee Stock Purchase Plan $ 1 1,392     1,393
Issuance of common stock under the Employee Stock Purchase Plan (in shares) 67,561        
Comprehensive income (loss)     2,132 26,875 29,007
Stock-based compensation   31,851     31,851
Balance at Dec. 31, 2019 $ 569 887,873 1,161 (296,402) 593,201
Balance (in shares) at Dec. 31, 2019 56,902,301        
Increase (Decrease) in Stockholders' Equity          
Issuance of common stock upon exercise of stock awards $ 9 16,608     16,617
Issuance of common stock upon exercise of stock awards (in shares) 858,470        
Issuance of restricted stock units $ 1 (1)      
Issuance of restricted stock units (in shares) 62,355        
Issuance of common stock under the Employee Stock Purchase Plan $ 1 1,426     1,427
Issuance of common stock under the Employee Stock Purchase Plan (in shares) 50,318        
Comprehensive income (loss)     (1,087) (69,333) (70,420)
Stock-based compensation   31,619     31,619
Balance at Dec. 31, 2020 $ 580 937,525 74 (365,735) 572,444
Balance (in shares) at Dec. 31, 2020 57,873,444        
Increase (Decrease) in Stockholders' Equity          
Sale of common stock $ 7 28,913     28,920
Sale of common stock (in shares) 748,062        
Issuance of common stock upon exercise of stock awards $ 5 12,276     12,281
Issuance of common stock upon exercise of stock awards (in shares) 520,240        
Issuance of restricted stock units $ 2 (2)      
Issuance of restricted stock units (in shares) 151,555        
Issuance of common stock under the Employee Stock Purchase Plan $ 1 1,836     1,837
Issuance of common stock under the Employee Stock Purchase Plan (in shares) 62,257        
Comprehensive income (loss)     (1,584) 82,631 81,047
Stock-based compensation   36,975     36,975
Balance at Dec. 31, 2021 $ 595 $ 1,017,523 $ (1,510) $ (283,104) $ 733,504
Balance (in shares) at Dec. 31, 2021 59,355,558