Quarterly report pursuant to Section 13 or 15(d)

2. Summary of Significant Accounting Policies (Details)

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2. Summary of Significant Accounting Policies (Details) - shares
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Antidilutive shares 27,990,266 26,849,010
Options    
Antidilutive shares 21,681,512 20,727,960
Warrants    
Antidilutive shares 6,308,754 6,121,050