Stock-Based Compensation

6 Months Ended

Jun. 30, 2015

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

Stock-Based Compensation

STOCK-BASED COMPENSATION

We classify our stock-based compensation expense (inclusive of our incentive stock plan, employee stock purchase plan, and 401(k) contribution matching program) in the accompanying Condensed Consolidated Statements of Operations, based on the department to which the recipient belongs. Stock-based compensation expense included within “operating costs and expenses” for the three and six months ended June 30, 2015 and 2014 was as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Cost of product sales	$	22	$	—	$	22	$	—
Research and development	419		511		852		955
Selling, general and administrative	3,087		2,163		5,116		4,570
Total stock-based compensation	$	3,528	$	2,674	$	5,990	$	5,525