Stock-Based Compensation (Tables)

9 Months Ended

Sep. 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 nine-month periods ended September 30, 2016 and 2015, consisted of the following (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Cost of goods sold	$	105	$	84	$	369	$	285
Research and development	51		35		147		94
Selling, general and administrative	347		439		1,397		1,264
Stock-based compensation expense before taxes	$	503	$	558	$	1,913	$	1,643

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, 2016 and 2015, the fair value of our stock-based awards granted was estimated using the following assumptions for the periods indicated below:

	Nine months ended September 30,
	2016	2015
Risk-free interest rate	1.15% - 1.40%	1.53% - 1.66%
Expected option life	5.0	5.0
Expected dividend yield	—%	—%
Expected price volatility	36.30% - 37.06%	33.72% - 35.11%