Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 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-month periods ended March 31, 2015 and 2014, consisted of the following (in thousands):

	2015		2014
Cost of goods sold	$	93	$	43
Research and development	27		16
Selling, general, and administrative	400		280
Stock-based compensation expense before taxes	$	520	$	339

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

In applying the Black-Scholes methodology to the options granted during the three months ended March 31, 2015, the fair value of our stock-based awards granted was estimated using the following assumptions for the periods indicated below:

	Three Months Ended
	March 31, 2015
Risk-free interest rate	1.53%
Expected option life	5.0
Expected dividend yield	—%
Expected price volatility	35.11%