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Debt - Summary of total debt (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Total debt $ 45,065 $ 36,241
Less: current portion of long-term debt (6,617) (7,053)
Long-term debt 38,448 29,188
Notes payable to banks    
Debt Instrument [Line Items]    
Total debt 20,445 23,040
Less: current portion of long-term debt (6,617)  
Long-term debt $ 13,828  
Notes payable to banks | Equipment Note 8    
Debt Instrument [Line Items]    
Stated Interest Rate (per annum) 2.75%  
Term (years) 5 years  
Total debt $ 2,345 2,871
Notes payable to banks | Equipment Note 10    
Debt Instrument [Line Items]    
Stated Interest Rate (per annum) 4.32%  
Term (years) 5 years  
Total debt $ 18,063 20,125
Notes payable to banks | Other equipment note    
Debt Instrument [Line Items]    
Stated Interest Rate (per annum) 4.55%  
Term (years) 5 years  
Total debt $ 37 44
Revolving loans    
Debt Instrument [Line Items]    
Term (years) 5 years  
Total debt $ 24,620 $ 13,201