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Significant accounting policies (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Significant Accounting Policies [Line Items]      
Revenue from contract with customers $ (5,904,877) $ (3,204,988)  
Revenue from service [member]      
Significant Accounting Policies [Line Items]      
Revenue from contract with customers $ 0 $ 0 $ 0