Loss per Share

12 Months Ended

Dec. 31, 2021

4. Loss per share

The net loss per share is calculated by dividing the net loss attributable to common stockholders by the weighted average number of shares outstanding for the years ended December 31, 2021 and 2020. In accordance with ASC Topic 260-10-45-13, Earnings Per Share, the weighted average of number of shares outstanding includes outstanding common stock and shares issuable for nominal consideration. Accordingly, warrants issued with a $0.01 per share exercise price, are included in weighted average shares outstanding as follows:

	2021		2020
Weighted average shares outstanding
Common shares		481,619,621		359,880,132
Common shares issuable assuming excercise of nominally priced warrants		36,736,021		18,248,513
Weighted average shares outstanding		518,355,642		378,128,645

Diluted net loss per share would be computed by dividing the net loss attributable to common stockholders by the weighted average number of shares of common stock and dilutive common stock equivalents outstanding. To the extent that securities are “anti-dilutive,” they are excluded from the calculation of diluted net loss per share. As a result of the net loss for the years ended December 31, 2021 and 2020, all potentially dilutive shares were anti-dilutive and therefore excluded from the computation of diluted net loss per share. Anti-dilutive equity securities consist of the following at December 31, 2021 and 2020, respectively (dollars in thousands):

	2021		2020
Common stock options		31,760		31,938
Common stock purchase warrants		168,192		142,266
Convertible notes payable		90,380		58,657
		290,332		232,861