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10. Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2013
Fair Value Measurements Tables  
Schedule of financial liabilities measured at fair value
    Total     Level 1     Level 2     Level 3  
2013                        
Warrant liability   $ 59,593     $ -     $ -     $ 59,593  
                                 
2012                                
Warrant liability   $ 267,950     $ -     $ -     $ 267,950  
                                 
Schedule of activity for liabilities measured at fair value
Balance as of December 31, 2011   $ -  
Issuances of warrant liabilities     1,189,095  
Exercise of warrant liabilities     (1,018,167 )
Realized and unrealized loss related to change in fair value     97,022  
Balance as of December 31, 2012   $ 267,950  
Issuances of warrant liabilities     995,418  
Exercise of warrant liabilities     (1,006,648 )
Realized and unrealized loss related to change in fair value     (197,127 )
Balance as of December 31, 2013   $ 59,593