Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

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

Schedule of Weighted Average Assumptions

The following table presents the weighted average assumptions we used in each of the following years:

	Years Ended December 31,
	2018			2017			2016
Risk free interest rate		2.82	%		1.99	%		1.45	%
Expected volatility		52	%		47	%		44	%
Expected term (in years)		6			6			6
Expected dividend yield		None			None			None

Summary of Stock Option Activity

The following table summarizes our stock option activity during the year ended December 31, 2018 and stock options outstanding and exercisable at December 31, 2018 for the above plans:

						Weighted
				Weighted		Average		Aggregate
				Average		Remaining		Intrinsic
				Exercise		Contractual		Value
	Number			Price		Term (in years)		(in thousands)
Outstanding at December 31, 2017		1,297,932		$	10.24
Granted		482,500			11.26
Exercised		(255,581	)		6.44
Forfeited		(85,773	)		17.50
Outstanding at December 31, 2018		1,439,078			10.83		4.36	$	10,116
Exercisable at December 31, 2018		716,351			9.44		3.10		5,964

Schedule of Fair Value and Intrinsic Value of Options

	Years Ended December 31,
	2018		2017		2016
Weighted average grant-date fair value of options granted during the period	$	5.86	$	8.94	$	4.74
Total intrinsic value of options exercised during the period (in thousands)		3,556		9,763		3,391
Total fair value of shares vested during the period (in thousands)		1,212		990		767

Schedule of Restricted Stock Units Activity

The following table summarizes our RSU activity during the year ended December 31, 2018 issued under the above plans:

	Restricted Stock Units			Weighted Average Grant Date Fair Value
Non-vested at December 31, 2017		445,000		$	13.71
Granted		91,000			12.35
Vested and distributed		(139,880	)		12.31
Non-vested at December 31, 2018		396,120			13.89