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FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value, Recurring - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Level 1    
Assets:    
Cash and cash equivalents $ 910 $ 28,843
Short-term investments   0
Total 910 28,843
Liabilities:    
Derivative liabilities at fair value 0 0
Warrants liability 0 0
Total 0 0
Level 2    
Assets:    
Cash and cash equivalents 0 0
Short-term investments   0
Total 0 0
Liabilities:    
Derivative liabilities at fair value 0 0
Warrants liability 2,675 32,140
Total 2,675 32,140
Level 3    
Assets:    
Cash and cash equivalents 0 0
Short-term investments   0
Total 0 0
Liabilities:    
Derivative liabilities at fair value $ 1,124 $ 12,875
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Convertible promissory notes Convertible promissory notes
Warrants liability $ 522 $ 9,010
Total $ 1,646 $ 21,885