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Revenue Recognition - Schedule of segment reporting (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Segment Reporting Information [Line Items]          
Revenues $ 1,301,727 $ 981,330 $ 3,672,760 $ 1,780,362  
Long-lived assets 1,936,512   1,936,512   $ 1,837,271
United States          
Segment Reporting Information [Line Items]          
Revenues 1,125,586 812,796 3,353,976 1,404,627  
Long-lived assets 1,915,685   1,915,685   1,811,607
United Kingdom          
Segment Reporting Information [Line Items]          
Revenues 99,995 113,703 137,385 254,989  
Denmark          
Segment Reporting Information [Line Items]          
Revenues 76,146 $ 54,831 181,399 $ 120,746  
Long-lived assets $ 20,827   $ 20,827   $ 25,664