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2. Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2016
Accounting Policies [Abstract]  
Antidilutive shares
   September 30, 2016   September 30, 2015 
Options   23,624,256    21,706,512 
Warrants   12,451,892    3,677,704 
Common stock issuable upon conversion of notes payable   3,776,792    399,667 
Total   39,852,940    25,783,883