Stock-Based Compensation and Plans (Tables)

12 Months Ended

Dec. 31, 2017

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

Option activity under the 2007 Plan for the year ended December 31, 2017, was as follows (in thousands, except as noted):

					Weighted
			Weighted-		Average
			Average		Remaining		Aggregate
			Exercise		Contractual		Intrinsic
	Options		Price		Term		Value
			(per share)		(in years)
Year Ended December 31, 2017
Outstanding at December 31, 2016		707	$	13.30		5.2	$	2,241
Granted		68		7.50		9.3
Forfeited		(87)		16.50
Expired		(46)		21.30
Outstanding at December 31, 2017		642	$	11.60		4.0	$	-
Vested and expected to vest December 31, 2017		627	$	11.50		3.8	$	-
Exercisable at December 31, 2017		562	$	10.70		3.3	$	-

Option activity under the 2007 Plan for the year ended December 31, 2016, was as follows (in thousands, except as noted):

					Weighted
			Weighted-		Average
			Average		Remaining		Aggregate
			Exercise		Contractual		Intrinsic
	Options		Price		Term		Value
			(per share)		(in years)
Year Ended December 31, 2016
Outstanding at December 31, 2015		575	$	10.50		5.3	$	1,972
Granted		132		25.40		9.3
Exercised		-		-
Forfeited		-		-
Outstanding at December 31, 2016		707	$	13.30		5.2	$	2,241
Vested and expected to vest December 31, 2016		673	$	12.70		5.0	$	2,239
Exercisable at December 31, 2016		544	$	10.10		4.1	$	2,236

Warrant [Member]

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

For stock options granted during 2017 and 2016 the following weighted average assumptions were used in determining fair value:

 

	2017			2016
Risk-free interest rate		2.06	%		1.37	%
Expected volatility		99	%		109	%
Expected term in years		6.1			6.1
Dividend yield		-	%		-	%