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Revenue Recognition - Schedule of revenues by geography (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Segment Reporting Information [Line Items]        
Revenues $ 1,598,627 $ 1,918,218 $ 2,844,081 $ 3,500,154
United States        
Segment Reporting Information [Line Items]        
Revenues 1,578,043 1,814,904 2,676,995 3,316,968
Denmark        
Segment Reporting Information [Line Items]        
Revenues $ 20,584 $ 103,314 $ 167,086 $ 183,186