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Variable interest entity (Details 1) - USD ($)
6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Variable Interest Entity, Primary Beneficiary [Member]    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Net loss from discontinued operations $ (3,842,329) $ (6,440,381)