Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense

The following table shows total stock-based compensation expense included in the condensed consolidated statements of operations for the three months ended March 31, 2019 and 2018 (in thousands):

	Three Months Ended
	March 31,
	2019		2018
Research and development	$	2,298	$	1,759
General and administrative		2,225		1,291
Total stock-based compensation expense	$	4,523	$	3,050