ACCRUED EXPENSES (Tables)

12 Months Ended

Dec. 31, 2022

Payables and Accruals [Abstract]

Accrued Expenses

Accrued expenses consist of the following (in thousands):

	December 31,
	2022		2021
Compensation	$	31,751	$	27,686
PPG Industries, Inc. agreement		9,864		8,853
Consulting		910		1,314
Professional fees		906		1,000
Royalties		877		691
Research and development agreements		662		1,469
Other		6,032		4,461
Accrued expenses	$	51,002	$	45,474