ACCRUED EXPENSES (Tables)

9 Months Ended

Sep. 30, 2023

Payables and Accruals [Abstract]

Accrued Expenses

Accrued expenses consist of the following (in thousands):

	September 30, 2023		December 31, 2022
Compensation	$	22,685	$	31,751
PPG Industries, Inc. agreement		6,090		9,864
Consulting		1,832		910
Professional fees		1,049		906
Research and development agreements		513		662
Royalties		414		877
Other		5,917		6,032
Accrued expenses	$	38,500	$	51,002