XML 89 R44.htm IDEA: XBRL DOCUMENT v3.23.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of credit risk (Details)
12 Months Ended
Dec. 31, 2022
USD ($)
item
Dec. 31, 2021
USD ($)
item
Dec. 31, 2020
item
Concentration of risks      
Operating lease right-of-use assets $ 191,877    
Operating lease liabilities 205,817    
ASC      
Concentration of risks      
Operating lease right-of-use assets 600,000    
Operating lease liabilities 600,000    
Concentration of credit risk | Cash and cash equivalents and short-term investments | Mainland of China      
Concentration of risks      
Cash and cash equivalents 8,617,157 $ 3,650,474  
Concentration of credit risk | Cash and cash equivalents and short-term investments | Outside the mainland of China      
Concentration of risks      
Cash and cash equivalents $ 135,141,521 $ 170,740,769  
Concentration of suppliers | Research and development services purchased      
Concentration of risks      
Number of major supplier | item 1 1 1
Concentration of suppliers | Research and development services purchased | One supplier      
Concentration of risks      
Concentration risk percentage 34.10% 18.50% 21.50%