Accrued Liabilities

6 Months Ended

Jun. 30, 2019

Payables And Accruals [Abstract]

Accrued Liabilities

5. Accrued Liabilities

Accrued liabilities consist of the following:

	June 30, 2019		December 31, 2018
	(In thousands)
Accrued payroll and related expenses	$	1,021	$	1,189
Accrued research and development expenses		299		1,028
Other		144		510
Total accrued liabilities	$	1,464	$	2,727