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Short term investments (Details) - USD ($)
Jun. 30, 2023
Dec. 31, 2022
Platform Operator, Crypto-Asset [Line Items]    
Short term investments $ 6,704,029
Fair Value, Inputs, Level 1 [Member]    
Platform Operator, Crypto-Asset [Line Items]    
Short term investments
Fair Value, Inputs, Level 2 [Member]    
Platform Operator, Crypto-Asset [Line Items]    
Short term investments
Fair Value, Inputs, Level 3 [Member]    
Platform Operator, Crypto-Asset [Line Items]    
Short term investments $ 6,704,029