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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Accrued Liabilities, Current [Abstract]    
Accrued salaries, wages and benefits $ 10,025 $ 7,323
Accrual for insurance liabilities 2,821 3,714
Sales taxes 4,904 3,021
Property taxes 1,050 389
Sale-leaseback arrangement 513 482
Accounting and audit fees 65 267
Interest   76
Other accrued expenses 1,353 1,694
Total accrued liabilities $ 20,731 $ 16,966