Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock-Based Compensation Expense

Total stock-based compensation expense was recognized in its condensed consolidated statements of operations and comprehensive loss as follows (in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Research and development		638	$	73		1,679	$	182
General and administrative		410		63		1,141		158
Total stock-based compensation	$	1,048	$	136	$	2,820	$	340