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Commitments and contingencies (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
lease
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
lease
Dec. 31, 2021
USD ($)
Jan. 01, 2022
USD ($)
Commitments and contingencies          
Remaining lease term 5 years   5 years    
Operating lease expense $ 201,439 $ 159,679 $ 555,806    
Variable lease expense $ 11,925 $ 18,237 $ 92,285    
Discount rate     4.90%    
Weighted-average discount rate for the operating leases 5.54% 3.16%      
Weighted-average remaining lease term 2 years 1 month 9 days 2 years 4 months 24 days 2 years 1 month 28 days    
Number of units in sale-leaseback | lease 19   19    
Maturity of the contractual, undiscounted operating lease liabilities          
2023     $ 578,280    
2023 $ 361,734        
2024 292,992   305,400    
2025 108,792   121,200    
2026 48,000   48,000    
Total undiscounted operating lease liabilities 811,518   1,052,880    
Interest on operating lease liabilities (43,236)   (51,603)    
Total present value of operating lease liabilities 768,282   1,001,277   $ 1,149,832
Total rent expense 68,625     $ 931,078  
Rent expense related to the short-term leases $ 95,381 $ 34,335 $ 94,386 $ 344,016