Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

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 six months ended June 30, 2016 and 2015 are as follows:

	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Risk free interest rate	1.2%	1.6% to 1.8%	1.2% to 1.4%	1.5% to 1.8%
Expected term	6.0 to 6.1 years	5.1 to 6.1 years	6.0 to 6.1 years	5.1 to 6.1 years
Expected volatility	78.1%	76.7% to 79.2%	77.8% to 78.1%	76.7% to 79.2%
Expected dividend yield	—%	—%	—%	—%

Stock-Based Compensation Expense

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Cost of contract manufacturing	$	94	$	103	$	196	$	196
Research and development	493		186		917		409
Selling, general and administrative	1,187		2,081		2,149		3,115
Total	$	1,774	$	2,370	$	3,262	$	3,720