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Consolidated Statements of Changes in Equity - 9 months ended Sep. 30, 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 (19,960)   (19,744)   (19,744) (216)
Other comprehensive loss (1,529)     (1,529) (1,529)  
Shares issued for cash by at-the-market offering (in shares)   4,798,472        
Shares issued for cash by at-the-market offering 10,082 $ 10,082     10,082  
Share issuance cost (283) (283)     (283)  
Share-based compensation 2,617 $ 2,617     2,617  
Shares issued for the vesting of restricted stock units (in shares)   752,580        
Shares issued for consulting services (in shares)   206,612        
Shares issued for consulting services 370 $ 370     370  
Contributions attributable to non-controlling interest 365         365
Ending balance (in shares) at Sep. 30, 2017   71,962,817        
Ending balance at Sep. 30, 2017 $ 129,525 $ 425,120 $ (301,265) $ 1,779 $ 125,634 $ 3,891