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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Shares
Additional paid in capital
Accumulated Other Comprehensive (Loss) Income
Accumulated Deficit
Balance (in shares) at Dec. 31, 2022   142,268      
Balance at Dec. 31, 2022 $ 405,435 $ 1,185,309 $ 85,489 $ (1,061) $ (864,302)
Increase (Decrease) in Stockholders' Equity          
Shares issued on exercise of stock options and vesting of restricted stock units (in shares)   761      
Shares issued on exercise of stock options and vesting of restricted stock units 1,639 $ 7,710 (6,071)    
Share-based compensation 9,467   9,467    
Unrealized loss on available-for-sale securities, net 73     73  
Net loss (26,206)       (26,206)
Balance (in shares) at Mar. 31, 2023   143,029      
Balance at Mar. 31, 2023 $ 390,408 $ 1,193,019 88,885 (988) (890,508)
Balance (in shares) at Dec. 31, 2023 143,833 143,833      
Balance at Dec. 31, 2023 $ 377,954 $ 1,200,218 120,788 (730) (942,322)
Increase (Decrease) in Stockholders' Equity          
Shares issued on exercise of stock options and vesting of restricted stock units (in shares) 6 2,231      
Shares issued on exercise of stock options and vesting of restricted stock units $ 28 $ 21,134 (21,106)    
Shares repurchased and cancelled, inclusive of transaction costs (in shares)   (2,374)      
Shares repurchased and cancelled, inclusive of transaction costs (13,370) $ (13,370)      
Share-based compensation 5,737   5,737    
Unrealized loss on available-for-sale securities, net (124)     (124)  
Net loss $ (10,749)       (10,749)
Balance (in shares) at Mar. 31, 2024 143,690 143,690      
Balance at Mar. 31, 2024 $ 359,476 $ 1,207,982 $ 105,419 $ (854) $ (953,071)