2. Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Antidilutive shares

At March 31, 2021 and 2020, we excluded the outstanding securities summarized below, which entitle the holders thereof to acquire shares of common stock as their effect would have been anti-dilutive.

	March 31, 2021		March 31, 2020
Options		32,780,601		42,390,601
Warrants		9,058,676		6,749,883
Common stock issuable upon conversion of notes payable		15,721,479		3,645,673
Total		57,560,756		52,786,157