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Income tax - Federal income tax rate (Details)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Reconciliation of the federal income tax rate to the Company's effective tax rate    
Statutory federal income tax rate 21.00% 21.00%
Change in fair value of warrant liabilities (15.80%) (26.68%)
Stock issuance costs   2.25%
Business combination expense 2.50%  
Change in valuation allowance 1.20% 3.43%
Income tax provision 8.90%