Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Share-based Compensation [Abstract]

Schedule of Stock Options Valuation Assumptions

The fair value of each stock option granted during the year was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions:

	2017		2016
Expected life (years)	4.0		4.8
Expected volatility	91	%	83	%
Risk-free interest rate	1.7	%	1.4	%
Weighted average fair value of options granted during the year	$0.40		$1.21

Schedule of Stock Options Activity

The following table summarizes stock option activity for the year ended December 31, 2017:

				Weighted
			Weighted Average	Average Remaining	Aggregate Intrinsic
	Number of Shares		Exercise Price Per Share	Contractual Life (years)	Value (in thousands)
Outstanding at December 31, 2015	286,568		$6.46
Granted	195,332		$1.86
Forfeited and Expired	(77,914	)	$4.46
Outstanding at December 31, 2016	403,986		$4.62	8.1	$0
Granted	2,550,000		$0.65
Forfeited and Expired	(376,126	)	$1.35
Outstanding at December 31, 2017	2,577,860		$1.17	8.7	$0
Exercisable at December 31, 2017	217,066		$6.04	6.4	$0