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Consolidated Statements of Changes in Equity - 6 months ended Jun. 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 (15,076)   (14,978)   (14,978) (98)
Other comprehensive income (752)     (752) (752)  
Shares issued for cash by at-the-market offering (in shares)   3,402,292        
Shares issued for cash by at-the-market offering 7,687 $ 7,687     7,687  
Share issuance cost (223) (223)     (223)  
Share-based compensation 1,784 $ 1,784     1,784  
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 Jun. 30, 2017   70,566,637        
Ending balance at Jun. 30, 2017 $ 132,018 $ 421,952 $ (296,499) $ 2,556 $ 128,009 $ 4,009