Stock-Based Compensation

3 Months Ended

Mar. 31, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

4. Stock-Based Compensation

The following table summarizes the total stock-based compensation expense included in the Company’s statements of operations for the periods presented (in thousands):

	Three Months Ended March 31,
	2018		2017
Cost of product sales	$	1,050	$	880
Research and development		7,657		5,301
Selling, general and administrative		11,735		9,390
	$	20,442	$	15,571