The Company calculates basic earnings per share by dividing net loss by the weighted average common shares outstanding during the period. Diluted earnings per share is computed by dividing net loss by the weighted average number of common shares outstanding during the period increased to include, if dilutive, the number of additional common shares that would have been outstanding if the potential common shares had been issued. The Company’s potentially dilutive shares include stock options and warrants for common stock.

Because the Company reported a net loss for the three and six months ended June 30, 2021 and 2020, all potentially dilutive shares of common stock have been excluded from the computation of the dilutive net loss per share for all periods presented. Such potentially dilutive shares of common stock consist of the following:

	June 30,
	2021		2020
Potentially dilutive securities, excluded:
Outstanding stock options		624,901		30,890
Warrants to purchase common stock		133,401		133,401
		758,302		164,291