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ACCRUED EXPENSES (Tables) | 3 Months Ended
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Mar. 31, 2024
Payables and Accruals [Abstract] |
Accrued Expenses | Accrued expenses consist of the following (in thousands):
|  | March 31, 2024 |  |  | December 31, 2023 |
PPG Industries, Inc. agreement |  | $ | 14,620 |  |  | $ | 11,962 |
Compensation |  |  | 14,174 |  |  |  | 29,456 |
Royalties |  |  | 2,225 |  |  |  | 647 |
Consulting |  |  | 2,116 |  |  |  | 2,121 |
Professional fees |  |  | 1,258 |  |  |  | 1,124 |
Research and development agreements |  |  | 687 |  |  |  | 822 |
Other |  |  | 7,019 |  |  |  | 5,948 |
Accrued expenses |  | $ | 42,099 |  |  | $ | 52,080 |

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