Consolidated Statements of Shareholders’ Equity (Deficit) (USD $)
In Thousands, except Share data
Common Stock [Member]
Additional Paid-in Capital [Member]
Warrant [Member]
Right to Invest [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Total
Balance at Dec. 31, 2011 $ 45,727 $ 5,632 $ 4,177 $ 4,142 $ (52,504) $ (177) $ 6,997
Balance, Shares (in Shares) at Dec. 31, 2011 2,749,228            
Issuance of common shares and common share purchase warrants, net of issuance costs of $66 8,488   1,868 (2,071)     8,285
Issuance of common shares and common share purchase warrants, net of issuance costs of $66 (in Shares) 400,643            
Expiration of right to invest   2,071   (2,071)      
Stock-based compensation expense   676         676
Net loss         (21,194)   (21,194)
Other comprehensive income (loss)           131 131
Balance at Dec. 31, 2012 54,215 8,379 6,045   (73,698) (46) (5,105)
Balance, Shares (in Shares) at Dec. 31, 2012 3,149,871            
Issuance of common shares 56,989           56,989
Issuance of common shares (in Shares) 13,000,000            
Reclassification of initial fair value of warrants denominated in Canadian dollars to liability     (1,572)       (1,572)
Reclassification of historic fair value of warrants   4,473 (4,473)        
Reclassification of fair value of options denominated in Canadian dollars to liability   (163)         (163)
Change in the fair value of stock-based compensation liability recorded to contributed surplus   (39)         (39)
Stock-based compensation expense   1,174         1,174
Net loss         (11,149)   (11,149)
Other comprehensive income (loss)           144 144
Balance at Dec. 31, 2013 111,204 13,824     (84,847) 98 40,279
Balance, Shares (in Shares) at Dec. 31, 2013 16,149,871            
Issuance of common shares 1,891           1,891
Issuance of common shares (in Shares) 694,865            
Reclassification of historic fair value of warrants   834         834
Change in the fair value of stock-based compensation liability recorded to contributed surplus   180         180
Issuance of warrants with secured promissory note   124         124
Stock-based compensation expense   2,091         2,091
Net loss         (30,712)   (30,712)
Other comprehensive income (loss)           1 1
Balance at Dec. 31, 2014 $ 113,095 $ 17,053     $ (115,559) $ 99 $ 14,688
Balance, Shares (in Shares) at Dec. 31, 2014 16,844,736