Accrued expenses consist of the following (in thousands):
June 30, 2017
December 31, 2016
Employee compensation and benefits
$
1,340
1,911
External research and preclinical development
3,176
3,290
Professional fees
642
819
Facilities
43
90
Restricted stock liability
—
5
5,201
6,115
No definition available.
Tabular disclosure of the components of accrued liabilities.