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2. Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2015
Accounting Policies [Abstract]  
Antidilutive shares
   September 30, 2015   September 30, 2014 
Options   21,706,512    20,757,030 
Warrants   3,677,704    5,421,050 
Common stock issuable upon conversion of notes payable   399,667     
Total   25,783,883    26,178,080