SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair value meaurement (Details) (Imported) - USD ($) |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | ||
| Noncash change in fair value of SAFE liabilities | $ (30,000) | $ (2,187,000) |
| Noncash change in fair value upon issuance (Day 1) | 1,318,000 | |
| Noncash change in fair value subsequent to issuance | $ 869,000 |