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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Total
Share capital [member]
Contributed surplus [member]
Revaluation surplus [member]
Accumulated other comprehensive (loss) income [member]
Retained earnings [member]
Common share [member]
Beginning balance at Dec. 31, 2016 $ 67,387 $ 24,954 $ 1,392 $ 6,132 $ (541) $ 35,450  
Beginning balance, shares at Dec. 31, 2016 38,882,945           38,882,945
Statement [LineItems]              
Shares issued pursuant to public offering, net of issuance costs $ 9,769 9,769          
Shares issued pursuant to public offering, net of issuance costs, Shares             2,500,000
Shares issued on exercise of stock options, Value 59 59          
Shares issued on exercise of stock options, Shares             91,667
Issuance of warrants for common shares 148   148        
Share-based compensation, Value 1,519 1,333 186        
Share-based compensation, Shares             768,000
Reclassification of previously recorded revaluation gain of land, net of tax (1,811)     (1,811)      
Net income 3,822         3,822  
Ending balance at Dec. 31, 2017 $ 81,043 36,115 1,726 4,321 (391) 39,272  
Ending balance, Shares at Dec. 31, 2017 42,242,612           42,242,612
Statement [LineItems]              
Cumulative translation adjustment $ 150       150    
Shares issued pursuant to public offering, net of issuance costs 15,737 15,737          
Shares issued pursuant to public offering, net of issuance costs, Shares             3,097,200
Shares issued pursuant to private placement of common shares, net of issuance costs 7,755 7,755          
Shares issued pursuant to private placement of common shares, net of issuance costs, shares             1,886,793
Shares issued on exercise of stock options, Value 283 434 (151)        
Shares issued on exercise of stock options, Shares             365,733
Share-based compensation, Value 1,454 831 623        
Share-based compensation, Shares             50,334
Net income (5,145)         (5,145)  
Ending balance at Dec. 31, 2018 $ 100,696 $ 60,872 $ 2,198 $ 4,321 (562) $ 33,867  
Ending balance, Shares at Dec. 31, 2018 47,642,671           47,642,672
Statement [LineItems]              
Cumulative translation adjustment $ (171)       $ (171)