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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, 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) $ 51   51
Shares issued, net of offering costs (Note 6) (in shares) 50,000    
Shares issued (RSUs vested, net of shares withheld) (Note 6) $ (357)   (357)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares) 889,762    
Stock-based compensation (Note 6) $ 668   668
Net loss   (3,436) (3,436)
Balances, end of period at Sep. 30, 2022 $ 474,543 (463,323) 11,220
Balances, end of period (in shares) at Sep. 30, 2022 118,128,994    
Balances, beginning of period at Jun. 30, 2022 $ 474,433 (461,631) 12,802
Balances, beginning of period (in shares) at Jun. 30, 2022 118,125,701    
Shares issued (RSUs vested, net of shares withheld) (Note 6) $ (2)   (2)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares) 3,293    
Stock-based compensation (Note 6) $ 112   112
Net loss   (1,692) (1,692)
Balances, end of period at Sep. 30, 2022 $ 474,543 (463,323) 11,220
Balances, end of period (in shares) at Sep. 30, 2022 118,128,994    
Balances, beginning of period at Dec. 31, 2022 $ 474,847 (464,818) 10,029
Balances, beginning of period (in shares) at Dec. 31, 2022 118,480,878    
Shares issued, net of offering costs (Note 6) $ 1,013   1,013
Shares issued, net of offering costs (Note 6) (in shares) 1,710,068    
Shares issued (RSUs vested, net of shares withheld) (Note 6) $ (142)   (142)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares) 412,548    
Shares issued (DSUs vested) (Note 6) (in shares) 485,000    
Stock-based compensation (Note 6) $ 528   528
Net loss   (4,928) (4,928)
Balances, end of period at Sep. 30, 2023 $ 476,246 (469,746) 6,500
Balances, end of period (in shares) at Sep. 30, 2023 121,088,494    
Balances, beginning of period at Jun. 30, 2023 $ 476,145 (468,292) 7,853
Balances, beginning of period (in shares) at Jun. 30, 2023 121,088,494    
Stock-based compensation (Note 6) $ 101   101
Net loss   (1,454) (1,454)
Balances, end of period at Sep. 30, 2023 $ 476,246 $ (469,746) $ 6,500
Balances, end of period (in shares) at Sep. 30, 2023 121,088,494