Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2015

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

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Stock-based compensation expense before income tax expense for the three and nine-month periods ended September 30, 2015 and 2014, consisted of the following (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Cost of goods sold	$	84	$	19	$	285	$	109
Research and development	35		24		94		57
Selling, general, and administrative	439		298		1,264		838
Stock-based compensation expense before taxes	$	558	$	341	$	1,643	$	1,004

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

In applying the Black-Scholes methodology to the options granted during the nine-month periods ended September 30, 2015 and 2014, the fair value of our stock-based awards granted was estimated using the following assumptions:

	Nine Months Ended
	September 30, 2015			September 30, 2014
Risk-free interest rate	1.53%	-	1.66%	1.97%
Expected option life in years	5.0			5.5
Expected dividend yield	—%			—%
Expected price volatility	33.72%	-	35.11%	36.90%