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2. Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2017
Accounting Policies [Abstract]  
Antidilutive shares
   March 31,
2017
   March 31,
2016
 
Options   29,974,256    23,184,256 
Warrants   9,064,317    8,885,242 
Common stock issuable upon conversion of notes payable   4,527,233    3,370,400 
Total   43,565,806    35,439,898