Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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 months ended March 31, 2015 and 2014 are as follows:

	Three Months Ended March 31,
	2015		2014
Risk free interest rate	1.5%		2.0%
Expected term	5.8 to 6.1 years		6.0 to 6.1 years
Expected volatility	78.5%		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 March 31,
	2015		2014
Cost of goods sold	$	93	$	127
Research and development	224		357
Selling, general and administrative	1,033		1,560
Total	$	1,350	$	2,044