Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share

Schedule for the calculations of basic and diluted earnings per share

	Three Months Ended March 31,
	2020		2019
Net loss	$	(5,179,000)	$	(5,812,000)
Less: decrease in fair value of investor warrants		(831,000)		—
Loss available to common stockholders	$	(6,010,000)	$	(5,812,000)
Basic and diluted weighted-average common shares outstanding		159,054,000		111,104,000
Add: dilutive effect of equity instruments		1,504,000		—
Diluted weighted-average shares outstanding		160,558,000		111,104,000
Earnings per share – basic	$	(0.03)	$	(0.05)
Earnings per share – diluted	$	(0.04)	$	(0.05)

Potentially dilutive securities, excluded

	Three Months Ended March 31,
	2020	2019
Outstanding stock options	5,948,000	5,426,000
Warrants to purchase shares of common stock	5,904,000	22,233,000
Total potentially dilutive shares of common stock	11,852,000	27,659,000