Accrued expenses consist of the following (in thousands):
June 30, 2023
December 31, 2022
Compensation
$
18,958
31,751
PPG Industries, Inc. agreement
8,142
9,864
Consulting
845
910
Professional fees
833
906
Research and development agreements
419
662
Royalties
333
877
Other
5,542
6,032
Accrued expenses
35,072
51,002
No definition available.
Tabular disclosure of the components of accrued liabilities.