Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

Stock-Based Compensation

Schedule of share-based compensation expense

Stock-based compensation expense was included in general and administrative and research and development costs as follows in the accompanying statements of comprehensive loss (in thousands):

	Three Months Ended
	March 31,
		2021		2020
Research and development	$	—	$	14
General and administrative		187		145
Total stock-based compensation	$	187	$	159

Schedule of stock option plan activity

	Three Months Ended
	March 31,
	2021	2020
Outstanding on January 1	920,355	633,277
Granted	—	360,000
Exercised	—	(84,589)
Forfeited/Cancelled	(270,287)	—
Outstanding on March 31	650,068	908,688

Schedule of weighted-average assumptions, option-pricing model

	Three months ended
	March 31,
	2021			2020
Expected stock price volatility		—	%		77.5	%
Expected life of options (years)		—			5.8
Expected dividend yield		—	%		0	%
Risk free interest rate		—	%		1.71	%