9. Accrued expenses
Accrued expenses consisted of the following (in thousands):
DECEMBER 31,2021
DECEMBER 31,2020
Accrued employee compensation
$
5,142
5,040
Accrued external research and development costs
2,420
1,475
Accrued professional services and consulting
1,523
902
Accrued facilities costs
190
846
Other expenditures
428
607
9,703
8,870