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EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENT - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Long-term Purchase Commitment [Line Items] |  |
Percent of services payable in cash or shares | 50.00% |
Issuance of common stock in connection with materials and license agreements (in shares) | 0 |
Charges to expense for cash portion of reimbursement of expenses | $ 3.8 | $ 4.6
New OLED Materials Agreement and OLED Materials Agreement [Member] | Weighted Average |  |
Long-term Purchase Commitment [Line Items] |  |
Minimum average closing price of common stock (in dollars per share) | $ 20 |

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