Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Valuation Assumptions for Stock Options Granted

The fair value of the stock options granted during the three months ended March 31, 2018, was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions:

	Three Months Ended March 31,
	2018
Expected life (years)	3.9
Expected volatility	89.9%
Expected dividend yield	—%
Risk-free interest rate	2.4%
Weighted average fair value of options granted during the period	$0.29

Schedule of Stock Option Activity

The following table summarizes stock option activity for the three month period ended March 31, 2018:

	Number of Options	Weighted Average Exercise Price Per Option		Weighted Average remaining Contractual Life (years)	Aggregate Intrinsic Value (in thousands)
Outstanding balance at December 31, 2017	2,577,860	$	1.17
Granted	125,000	0.65
Outstanding balance at March 31, 2018	2,702,860	$	1.15	8.5	$0
Options exercisable at March 31, 2018	1,187,871	$	1.68	8.6	$0