Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Summary Of Significant Accounting Policies Share-based Compensation

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,
Assumptions (weighted-average)		2018		2017
Volatility		73%		79%
Expected term (in years)		3.2		4.0
Risk-free rate		2.8%		1.6%
Expected dividends		0.0%		0.0%
Pre-vest forfeiture rate		8.5%		8.5%
Grant date fair value of options granted	$	0.58	$	1.03

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, 2016	4,003	$	3.94	7.3	$	4
Granted	1,724		1.76	-		-
Exercised	(46)		1.87	-		-
Forfeited or expired	(647)		6.09	-		-
Outstanding as of December 31, 2017	5,034		2.94	6.6		53
Granted	1,229		1.16	-		-
Exercised	-		-	-		-
Forfeited or expired	(1,617)		3.51	-		-
Outstanding as of December 31, 2018	4,646	$	2.27	7.0	$	-
Vested and expected to vest as of December 31, 2018	4,364	$	3.04	6.8	$	-
Exercisable as of December 31, 2018	2,252	$	2.30	5.0	$	-