Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2016

The assumptions used in the Black-Scholes option-pricing model for the three and nine months ended September 30, 2016 and 2015 are as follows:



	Three Months Ended September 30,		Nine Months Ended September 30,
	2016	2015	2016	2015
Risk free interest rate	1.1% to 1.3%	1.6%	1.1% to 1.4%	1.5% to 1.8%
Expected term	5.1 to 6.1 years	6.1 years	5.1 to 6.1 years	5.1 to 6.1 years
Expected volatility	77.0% to 78.1%	77.6%	77.0% to 78.1%	76.7% to 79.2%
Expected dividend yield	—%	—%	—%	—%

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



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Cost of contract manufacturing	$	98	$	87	$	294	$	283
Research and development	532		364		1,449		774
Selling, general and administrative	1,311		905		3,460		4,019
Total	$	1,941	$	1,356	$	5,203	$	5,076