2. Summary of Significant Accounting Policies (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Antidilutive shares excluded from EPS	57,560,756	52,786,157
Options [Member]
Antidilutive shares excluded from EPS	32,780,601	42,390,601
Warrants [Member]
Antidilutive shares excluded from EPS	9,058,676	6,749,883
Convertible Notes [Member]
Antidilutive shares excluded from EPS	15,721,479	3,645,673