v3.26.1
SHARE-BASED PAYMENT - Summary of warrants and pre-funded warrants activity and related information (Details) - Warrants and Prefunded Warrants - $ / shares
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Weighted Average Exercise Price        
Outstanding, Beginning Balance $ 0.08 $ 0.17 $ 0.17  
Expired 0.06 0.32    
Exercised   0.06    
Outstanding, Ending Balance 0.09 $ 0.08 $ 0.17 $ 0.17
Vested and expected to vest 0.09      
Exercisable $ 0.09      
Weighted average remaining contractual life        
Outstanding 1 year 6 months 21 days 1 year 9 months 3 days 2 years 25 days 3 years 25 days
Exercised   2 months 1 day    
Vested and expected to vest 1 year 6 months 21 days      
Exercisable 1 year 6 months 21 days      
Common Class A        
Number of options        
Outstanding, Beginning balance 470,833,300 731,333,300 731,333,300  
Expired (155,166,650) (260,000,000)    
Exercised   (500,000)    
Outstanding, Ending balance 315,666,850 470,833,300 731,333,300 731,333,300
Vested and expected to vest 315,666,850      
Exercisable 315,666,850