Accrued Liabilities

3 Months Ended

Mar. 31, 2021

Accrued Liabilities, Current [Abstract]

Accrued Liabilities

5. Accrued Liabilities

Accrued liabilities as of March 31, 2021 and December 31, 2020 consisted of the following (in thousands):

	March 31, 2021		December 31, 2020
Contract research organization costs	$	32,868	$	31,646
Other clinical study related costs		4,000		3,901
Compensation and benefits		1,749		4,686
Professional fees		1,134		830
Other		4,324		4,159
Total accrued liabilities	$	44,075	$	45,222