Equity-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

Equity-Based Compensation

Schedule of equity-based compensation expense

Equity-based compensation expense for the three months ended March 31, 2014 and 2013, consisted of the following (in thousands):

	Three Months Ended March 31
	2014		2013
Cost of product sales	$	28	$	23
Research and development	449		932
Selling, general and administrative	1,453		1,328
Total equity-based compensation expense	$	1,930	$	2,283