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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock [Member]
Accumulated Deficit [Member]
Total
Balances, beginning of period at Dec. 31, 2020 $ 460,501 $ (444,650) $ 15,851
Balances, beginning of period (in shares) at Dec. 31, 2020 103,171,904    
Shares issued, net of offering costs (Note 6) $ 434   434
Shares issued, net of offering costs (Note 6) (in shares) 405,800    
Shares issued (RSUs vested, net of shares withheld) (Note 6) $ (194)   (194)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares) 421,219    
Stock-based compensation (Note 6) $ 421   421
Net loss   (3,099) (3,099)
Balances, end of period at Mar. 31, 2021 $ 461,162 (447,749) 13,413
Balances, end of period (in shares) at Mar. 31, 2021 103,998,923    
Balances, beginning of period at Dec. 31, 2021 $ 474,181 (459,887) 14,294
Balances, beginning of period (in shares) at Dec. 31, 2021 117,189,232    
Shares issued, net of offering costs (Note 6) $ (327)   (327)
Shares issued, net of offering costs (Note 6) (in shares) 791,868    
Stock-based compensation (Note 6) $ 444   444
Net loss   (320) (320)
Balances, end of period at Mar. 31, 2022 $ 474,298 $ (460,207) $ 14,091
Balances, end of period (in shares) at Mar. 31, 2022 117,981,100