v3.26.1
STOCK BASED COMPENSATION - Stock-based compensation expense (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
STOCK BASED COMPENSATION        
Stock-based compensation expense $ 1,534 $ 3,857 $ 9,449 $ 9,125
Stock options        
STOCK BASED COMPENSATION        
Stock-based compensation expense 1,534 3,857 9,449 9,125
Stock options | Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense        
STOCK BASED COMPENSATION        
Stock-based compensation expense 240 347    
Stock options | Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpenses        
STOCK BASED COMPENSATION        
Stock-based compensation expense     1,001 677
Stock options | Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense        
STOCK BASED COMPENSATION        
Stock-based compensation expense $ 1,294 $ 3,510 $ 8,448 $ 8,448