Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Shares
Additional paid in capital
Accumulated Other Comprehensive (Loss) Income
Accumulated Deficit
Balance (in shares) at Dec. 31, 2021   141,600,000      
Balance at Dec. 31, 2021 $ 479,091 $ 1,177,051 $ 59,014 $ (852) $ (756,122)
Increase (Decrease) in Stockholders' Equity          
Shares issued on exercise of stock options and vesting of restricted stock units (in shares)   142,000      
Shares issued on exercise of stock options and vesting of restricted stock units 405 $ 1,756 (1,351)    
Shared-based compensation 7,023   7,023    
Unrealized gain (loss) on available-for-sale securities, net of tax of nil (766)     (766)  
Net loss (37,630)       (37,630)
Balance (in shares) at Mar. 31, 2022   141,742,000      
Balance at Mar. 31, 2022 $ 448,123 $ 1,178,807 64,686 (1,618) (793,752)
Balance (in shares) at Dec. 31, 2022 142,268,000 142,268,000      
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) 319,000 761,000      
Shares issued on exercise of stock options and vesting of restricted stock units $ 1,639 $ 7,710 (6,071)    
Shared-based compensation 9,467   9,467    
Unrealized gain (loss) on available-for-sale securities, net of tax of nil 73     73  
Net loss $ (26,206)       (26,206)
Balance (in shares) at Mar. 31, 2023 143,029,000 143,029,000      
Balance at Mar. 31, 2023 $ 390,408 $ 1,193,019 $ 88,885 $ (988) $ (890,508)