Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2015

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

Assumptions used in the Black-Scholes Option-Pricing Model

The assumptions used in the Black-Scholes option-pricing model for the three and nine months ended September 30, 2015 and 2014 are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015	2014
Risk free interest rate	1.6%		2.0%		1.5% to 1.8%	1.6% to 2.0%
Expected term	6.1 years		6.1 years		5.1 to 6.1 years	5.1 to 6.1 years
Expected volatility	77.6%		83.8%		76.7% to 79.2%	83.8% to 84.9%
Expected dividend yield	—	%	—	%	—%	—%

Stock-Based Compensation Expense

The Company recognized stock-based compensation expense in continuing operations as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Cost of goods sold	$	87	$	101	$	283	$	369
Research and development	364		262		774		983
Selling, general and administrative	905		1,253		4,019		4,582
Total	$	1,356	$	1,616	$	5,076	$	5,934