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Summary of Significant Accounting Policies - Property, equipment and depreciation (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]        
Property and equipment, net $ 152,772 $ 108,440 $ 152,772 $ 108,440
Depreciation and amortization     $ 86,073 $ 34,515
Carrying value adjustments $ 0 $ 0    
Minimum        
Property, Plant and Equipment [Line Items]        
Estimated useful life (in years)     3 years  
Maximum        
Property, Plant and Equipment [Line Items]        
Estimated useful life (in years)     7 years