Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2019

Payables And Accruals [Abstract]

Accrued Liabilities

Accrued liabilities at June 30, 2019 and December 31, 2018, consisted of the following (in thousands):

	June 30, 2019		December 31, 2018
Accrued compensation and related costs	$	8,073	$	10,765
Accrued professional services		4,652		4,544
Other accrued expenses		3,929		4,491
Total accrued liabilities	$	16,654	$	19,800