Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Canceled/expired

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The following table summarizes the weighted-average valuation assumptions and weighted-average grant date fair value of options granted during the periods shown below:

		Year Ended December 31,
		2020		2019
Assumptions (weighted-average)
Volatility		111%		78%
Expected term (in years)		4.0		4.0
Risk-free rate		0.3%		1.9%
Expected dividends		0.0%		0.0%
Pre-vest forfeiture rate		8.5%		8.5%
Grant date fair value of options granted	$	1.20	$	0.37

Options activity and positions

The following table summarizes activity and positions with respect to options for the periods shown below (in thousands):

				Weighted-average
				remaining		Aggregate
			Weighted-average	contractual		intrinsic
Options	Shares		exercise price	term (in years)		value
Outstanding as of December 31, 2018	4,646	$	2.27	7.0	$	-
Granted	1,636		0.65	-		-
Exercised	-		-	-		-
Forfeited or expired	(1,178)		2.66	-		-
Outstanding as of December 31, 2019	5,104		1.66	7.4		122
Granted	68		1.60	-		-
Exercised	(693)		1.44	-		-
Forfeited or expired	(1,198)		2.20	-		-
Outstanding as of December 31, 2020	3,281	$	1.51	6.6	$	12,784
Vested and expected to vest as of December 31, 2020	3,193	$	1.53	6.5	$	12,379
Exercisable as of December 31, 2020	2,086	$	1.86	5.6	$	7,413