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Consolidated Statements of Changes in Equity - 3 months ended Mar. 31, 2017 - USD ($)
$ in Thousands
Total
Common Stock
Deficit
Accumulated other comprehensive income
Total shareholders' equity
Non-controlling interests
Beginning balance ( in shares) at Dec. 31, 2016   66,205,153        
Beginning balance at Dec. 31, 2016 $ 137,863 $ 412,334 $ (281,521) $ 3,308 $ 134,121 $ 3,742
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (10,596)   (10,508)   (10,508) (88)
Other comprehensive income 244     244 244  
Shares issued for cash by at-the-market offering (in shares)   3,158,825        
Shares issued for cash by at-the-market offering 7,175 $ 7,175     7,175  
Share issuance cost (210) (210)     (210)  
Share-based compensation 1,041 $ 1,041     1,041  
Shares issued for the vesting of restricted stock units (in shares)   752,580        
Shares issued for consulting services (in shares)   103,306        
Shares issued for consulting services 216 $ 216     216  
Ending balance (in shares) at Mar. 31, 2017   70,219,864        
Ending balance at Mar. 31, 2017 $ 135,733 $ 420,556 $ (292,029) $ 3,552 $ 132,079 $ 3,654