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10. Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2014
Fair Value Measurements Tables  
Schedule of financial liabilities measured at fair value

                         
    Total     Level 1     Level 2     Level 3  
2014                        
Warrant liability   $ 108     $ -     $ -     $ 108  
2013                                
Warrant liability   $ 60     $ -     $ -     $ 60  
                                 
                                 
Schedule of activity for liabilities measured at fair value

Balance as of December 31, 2012   $ 268  
Issuances of warrant liabilities     996  
Exercise of warrant liabilities     (1,007 )
Related change in fair value     (197 )
Balance as of December 31, 2013   $ 60  
Related change in fair value     48  
Balance as of December 31, 2014   $ 108