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Stock-Based Compensation - Share-based compensation expense (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 1,802,623 $ 1,086,769
Cost of service    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense 103,329 108,027
Research and development    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense 768,679 503,111
General and administrative    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 930,615 $ 475,631