Quarterly report pursuant to Section 13 or 15(d)

2. Summary of Significant Accounting Policies (Tables)

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2. Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]  
Antidilutive shares
    June 30,
2018
    June 30,
2017
 
Options     37,301,300       35,313,541  
Warrants     5,006,355       21,507,270  
Common stock issuable upon conversion of notes payable     5,287,502       9,968,933  
Total     47,595,157       66,789,744