Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

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

Schedule of expenses related to share-based payments

The following table highlights stock based compensation for the years ended December 31, 2014, 2013 and 2012:

(in thousands)	2014		2013		2012
Nonvested stock	$	843	$	512	$	580
Stock options	1,632		511		383
Restricted stock units	194		26		—
Stock purchases	—		—		342
Stock based compensation	$	2,669	$	1,049	$	1,305

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The Company used the following assumptions to value the stock options issued during the years ended December 31, 2014, 2013 and 2012:

	2014		2013		2012
Expected dividend yield	0	%	0	%	0	%
Expected volatility factor (a)	47% - 49%		49% - 51%		58	%
Risk-free interest rate (b)	1.8% - 1.9%		1.8% - 2.0%		0.8% - 0.9%
Expected term (in years) (c)	6.0		6.0 - 6.5		3.7 - 3.9

(a)    The Company estimated its volatility factor based on the average volatilities of similar public entities.

(b)    The risk-free interest rate is based on U.S. Treasury yields in effect at the time of grant.

(c)    For stock options granted during the years ended December 31, 2014 and 2013, the expected term was derived utilizing

the "simplified method" in accordance with Securities and Exchange Commission Staff Accounting Bulletin No. 110, which uses the mid-point between the vesting date and the expiration date of the award. We believe use of this approach is appropriate given the lack of prior history of option exercises upon which to base an expected term. For stock options granted during the year ended December 31, 2012, the expected term was based on the vesting term and contractual term of the options and the expected exercise behavior of the option holders.

Schedule of nonvested stock awards and restricted stock units awards

The following is a summary of nonvested stock and restricted stock unit activity:

	Nonvested Stock				Restricted Stock Units
	Number of Shares Outstanding		Weighted Average Grant Date Fair Value		Number of Units Outstanding		Weighted Average Grant Date Fair Value
December 31, 2011	668,779		$	1.11	—		$	—
Granted	234,086		1.98		—		—
Vested	(448,355	)	1.51		—		—
Forfeited	(58,437	)	1.92		—		—
December 31, 2012	396,073		1.06		—		—
Granted	593,878		16.78		10,000		13.96
Vested	(561,958	)	6.51		—		—
Forfeited	—		—		—		—
December 31, 2013	427,993		15.72		10,000		13.96
Granted	44,245		20.34		11,124		18.39
Vested	(388,298	)	15.87		(5,000	)	13.96
Forfeited	—		—		—		—
December 31, 2014	83,940		$	17.46	16,124		$	17.02

Schedule of stock options

The following is a summary of stock option award activity:

	Number of Options		Weighted Average Exercise Price		Contractual Term (in years)	Intrinsic Value (in thousands)
Outstanding at December 31, 2011	910,189		$	2.04
Granted	1,006,936		0.97
Exercised	—		—
Forfeited	(1,144,274	)	1.82
Outstanding at December 31, 2012	772,851		0.97
Granted	489,377		14.17
Exercised	(546,244	)	0.97
Forfeited	(1,500	)	14.00
Outstanding at December 31, 2013	714,484		9.98
Granted	362,939		20.29
Exercised	(14,804	)	0.97
Forfeited	(36,403	)	14.71
Expired	(2,579	)	14.00
Outstanding at December 31, 2014	1,023,637		$	13.59	8.5	$	3,602
Exercisable at December 31, 2014	235,107		$	7.76	7.4	$	1,795
Vested and expected to vest at December 31, 2014	944,442		$	13.22	8.5	$	3,566

Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]

The following table summarizes the Company’s total unrecognized compensation cost related to equity based compensation as of December 31, 2014:

(in thousands, except period data)	Unrecognized Compensation Cost		Weighted Average Remaining Period of Expense Recognition (in years)
Nonvested stock	$	1,053	2.4
Stock options	4,166		2.3
Restricted stock units	124		0.5
	$	5,343