Stock-Based Compensation

3 Months Ended

Mar. 31, 2019

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

STOCK-BASED COMPENSATION

We report 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 assigned department of the recipient. Stock-based compensation expense, included within “total operating costs and expenses” for the three months ended March 31, 2019 and 2018, was as follows:



	Three Months Ended March 31,
	2019		2018
Selling, general and administrative	$	3,626	$	2,253
Research and development	969		632
Total stock-based compensation	$	4,595	$	2,885