SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Collaboration Arrangements and Partnership Agreements (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
May 18, 2026 |
|
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||
| Expense reimbursements | $ 3,410 | $ 34 | |
| One Partner | |||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||
| Expense reimbursements | $ 3,360 | ||
| Convertible Promissory Note, January 2026 | Subsequent Event [Member] | |||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||
| Performance of research and development services | $ 900 | ||