v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of credit risk (Details)
6 Months Ended
Jun. 30, 2026
USD ($)
item
Jun. 30, 2025
item
Dec. 31, 2025
USD ($)
Concentration of risks      
Cash and cash equivalents $ 127,909,840   $ 74,523,782
Concentration of credit risk | Cash and cash equivalents | Mainland of China      
Concentration of risks      
Cash and cash equivalents 6,150,976   8,327,345
Concentration of credit risk | Cash and cash equivalents | Outside the mainland of China      
Concentration of risks      
Cash and cash equivalents $ 121,758,864   $ 66,196,437
Concentration of suppliers | Research and development services purchased      
Concentration of risks      
Number of major supplier | item 1 1  
Concentration of suppliers | Research and development services purchased | One supplier      
Concentration of risks      
Concentration risk percentage 15.00% 12.00%  
Concentration of suppliers | Research and development services purchased | Second supplier      
Concentration of risks      
Concentration risk percentage 20.00% 10.00%