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ACCRUED EXPENSES (Tables) | 3 Months Ended
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Mar. 31, 2022
Payables and Accruals [Abstract] |
Accrued Expenses | Accrued expenses consist of the following (in thousands):
|  | March 31, 2022 |  |  | December 31, 2021 |
Compensation |  | $ | 12,997 |  |  | $ | 27,686 |
PPG agreements |  |  | 6,705 |  |  |  | 8,853 |
Research and development agreements |  |  | 1,746 |  |  |  | 1,469 |
Professional fees |  |  | 1,432 |  |  |  | 1,000 |
Consulting |  |  | 645 |  |  |  | 1,314 |
Royalties |  |  | 154 |  |  |  | 691 |
Other |  |  | 3,281 |  |  |  | 4,461 |
Accrued expenses |  | $ | 26,960 |  |  | $ | 45,474 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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