Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

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, 2017 and 2016, consisted of the following (in thousands):

	Three Months Ended March 31,
	2017		2016
Cost of goods sold	$	96	$	123
Research and development	52		42
Selling, general, and administrative	429		459
Stock-based compensation expense before taxes	$	577	$	624

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

In applying the Black-Scholes methodology to the options granted during the three-month period ended March 31, 2016, 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, 2016
Risk-free interest rate	1.4%
Expected option life	5.0 years
Expected dividend yield	—%
Expected price volatility	37.06%