Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

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 six-month periods ended June 30, 2016 and 2015, consisted of the following (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Cost of goods sold	$	141	$	109	$	264	$	202
Research and development	54		32		96		59
Selling, general and administrative	591		424		1,050		824
Stock-based compensation expense before taxes	$	786	$	565	$	1,410	$	1,085

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

In applying the Black-Scholes methodology to the options granted during the six-month periods ended June 30, 2016 and 2015, the fair value of our stock-based awards granted was estimated using the following assumptions for the periods indicated below:

	Six months ended June 30,
	2016	2015
Risk-free interest rate	1.25% - 1.40%	1.53% - 1.57%
Expected option life	5.0	5.0
Expected dividend yield	—%	—%
Expected price volatility	36.50% - 37.06%	34.00% - 35.11%