EQUITY AND CASH COMPENSATION UNDER THE PPG AGREEMENT - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Long-term Purchase Commitment [Line Items] | ||||
| Percent of services payable in cash or shares | 50.00% | 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 | $ 3.9 | $ 11.8 | $ 12.7 |
| 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 | |||