Accrued expenses consisted of the following as of September 30, 2019 and December 31, 2018 (in thousands):
September 30, 2019
December 31, 2018
External research and preclinical development
$
7,271
10,119
Employee compensation and benefits
3,323
2,985
Professional fees
549
618
Facilities and other
61
171
11,204
13,893
No definition available.
Tabular disclosure of the components of accrued liabilities.