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Consolidated Statements of Changes in Equity - USD ($)
$ in Thousands
Total
Common Stock
Deficit
Accumulated other comprehensive income
Total shareholders' equity
Non-controlling interests
Beginning balance ( in shares) at Dec. 31, 2019   100,735,889        
Beginning balance at Dec. 31, 2019 $ 130,607 $ 493,958 $ (370,036) $ 2,989 $ 126,911 $ 3,696
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (5,664)   (5,657)   (5,657) (7)
Other comprehensive income 152     152 152  
Shares issued for cash by public offering (in shares)   11,300,000        
Shares issued for cash by public offering 16,611 $ 16,611     16,611  
Shares Issued For Cash By At The Market Offering Shares   2,388,815        
Shares Issued For Cash By At The Market Offering 4,047 $ 4,047     4,047  
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs 1,563 1,563     1,563  
Share-based compensation 997 $ 997     997  
Shares issued for the vesting of restricted stock units (in shares)   490,453        
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units (415) $ (415)     (415)  
Shares issued for consulting services (in shares)   (30,000)        
Shares issued for consulting services (57) $ (57)     (57)  
Contributions attributable to non-controlling interest 133         133
Ending balance (in shares) at Mar. 31, 2020   114,945,157        
Ending balance at Mar. 31, 2020 144,962 $ 513,692 (375,693) 3,141 141,140 3,822
Beginning balance ( in shares) at Dec. 31, 2020   134,311,033        
Beginning balance at Dec. 31, 2020 157,546 $ 549,317 (397,812) 2,308 153,813 3,733
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net loss (10,910)   (10,908)   (10,908) (2)
Other comprehensive income 353     353 353  
Shares Issued For Cash By At The Market Offering Shares   5,534,166        
Shares Issued For Cash By At The Market Offering 30,603 $ 30,603     30,603  
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs 689 689     689  
Share-based compensation 697 $ 697     697  
shares issued for exrcise of stock options (in shares)   278,111        
Shares issued for the vesting of restricted stock units 666 $ 666     666  
Shares issued for the vesting of restricted stock units (in shares)   478,781        
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units (659) $ (659)     (659)  
Shares issued for exercise of warrants (in shares)   190,405        
Shares issued for exercise of warrants 1,105 $ 1,105     1,105  
Shares issued for consulting services (in shares)   (24,000)        
Shares issued for consulting services (95) $ (95)     (95)  
Ending balance (in shares) at Mar. 31, 2021   140,816,496        
Ending balance at Mar. 31, 2021 $ 178,807 $ 581,135 $ (408,720) $ 2,661 $ 175,076 $ 3,731