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Accrued expenses and other current liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Accrued expenses and other current liabilities    
Accrued expenses $ 13,788 $ 12,320
Cylinder deposits 20,476 19,426
Lease obligations 2,001 1,961
Other current liabilities 123 106
Total $ 36,388 $ 33,813