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Commitments and contingencies, Operating Leases (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Aug. 31, 2021
EUR (€)
ft²
Mar. 31, 2021
USD ($)
Mar. 08, 2021
USD ($)
ft²
Feb. 04, 2021
ft²
Operating Leases [Abstract]            
Area of leased space | ft²     1,017   21,401 6,041
Annual rent       $ 456,095 $ 1,498,070  
Lease contract term         8 years 5 months 5 years
Security deposit         $ 750,000  
Monthly basic rate plus VAT | €     € 7,768      
Term of option to extend lease         5 years  
Operating lease expenses $ 761,188 $ 26,672        
Future Lease Payments [Abstract]            
2022 1,458,088          
2023 2,299,875          
2024 2,283,363          
2025 2,319,447          
2026 1,942,341          
Thereafter 6,350,640          
Total $ 16,653,754          
Maximum [Member]            
Operating Leases [Abstract]            
Security deposit | €     € 30,000      
Other Non-current Assets [Member]            
Operating Leases [Abstract]            
Security deposit       $ 114,023