Debt - Summary of total debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total debt	$ 62,338	$ 40,553
Less: current portion of long-term debt	(5,265)	(5,074)
Long-term debt	57,073	35,479
Notes payable to banks
Debt Instrument [Line Items]
Total debt	$ 23,041	27,638
Notes payable to banks | Equipment Note 8
Debt Instrument [Line Items]
Stated Interest Rate (per annum)	2.75%
Term (years)	5 years
Total debt	$ 2,871	3,464
Notes payable to banks | Equipment Note 10
Debt Instrument [Line Items]
Stated Interest Rate (per annum)	4.32%
Term (years)	5 years
Total debt	$ 20,124	24,119
Notes payable to banks | Other equipment note
Debt Instrument [Line Items]
Stated Interest Rate (per annum)	4.55%
Term (years)	5 years
Total debt	$ 46	55
Revolving loans
Debt Instrument [Line Items]
Term (years)	5 years
Total debt	$ 39,297	$ 12,915