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INCOME TAXES - Components of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 32,568 | $ 26,441
Capitalized R&D expenses | 5,087 | 5,657
Research and development tax credits | 1,318 | 1,318
Accrued expenses | 443 | 95
Operating lease liabilities | 212 | 306
Other | 42 | 13
Total deferred tax assets | 39,670 | 33,830
Valuation allowance | (39,295) | (33,384)
Deferred tax assets less valuation allowance | 375 | 446
Deferred tax liabilities: |  |
Depreciation | (132) | (151)
Operating lease right-of-use assets | (202) | (295)
Unrealized gains/losses | (41) | 0
Total deferred tax liabilities | (375) | (446)
Net deferred tax assets | $ 0 | $ 0

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