Quarterly report [Sections 13 or 15(d)]

SHARE-BASED COMPENSATION - Option activity (Details)

v3.26.1
SHARE-BASED COMPENSATION - Option activity (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Options outstanding    
Outstanding, vested and expected to vest at the beginning of the period 227,775  
Outstanding, vested and expected to vest at the end of the period 227,775 227,775
Exercisable 214,101  
Weighted Average Exercise Price    
Weighted Average Exercise price, Beginning of the period $ 88.45  
Weighted Average Exercise price, End of the period 88.45 $ 88.45
Exercisable $ 90.28  
Weighted Average Remaining Contractual Term (in years)    
Weighted average contractual life 6 years 9 months 3 days 6 years 9 months 3 days
Weighted Average Remaining Contractual Term, Exercisable 6 years 5 months 1 day  
Aggregate Intrinsic Value    
Aggregate Intrinsic Value, Beginning of the period $ 0  
Aggregate Intrinsic Value, End of the period 0 $ 0
Aggregate Intrinsic Value, Exercisable $ 0