Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Payables And Accruals [Abstract]

Summary of Accrued Liabilities

Accrued liabilities consist of the following:

	As of December 31,
	2018		2017
	(In thousands)
Accrued payroll and related expenses	$	1,189	$	394
Accrued research and development expenses		1,028		3,250
Deferred offering costs		—		238
Other		510		105
Total accrued liabilities	$	2,727	$	3,987