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Long-term debt (Details) - Secured debt [Member]
 12 Months Ended
Dec. 15, 2021
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Debt Instrument [Line Items]      
Debt instrument, face amount $ 40,000,000 $ 26,250,000 $ 31,250,000
Debt instrument, frequency of periodic payment quarterly    
Debt instrument, periodic payment, principal $ 1,250,000    
Debt instrument, description of variable rate basis   Wall Street Journal Prime Rate  
Debt instrument basis spread reduction on variable rate   0.01  
Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate   5.75%  
Long term debt with an interest rate swap contract   $ 20,000,000  
Fixed rate of interest on long term debt with interest rate swap   6.40%  
DebtInstrumentMaturityMonthandYear   Feb. 05, 2027