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Revenue Recognition - Schedule of long-lived assets (Details) - USD ($)
Jun. 30, 2023
Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 1,924,579 $ 1,978,584
United States    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 1,707,806 1,795,267
United Kingdom    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 3,611 1,335
Denmark    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 213,162 $ 181,982