Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Payables and Accruals [Abstract]

Schedule of accrued liabilities

Accrued liabilities at December 31, 2017 and 2016 consisted of the following:

	2017		2016
Accrued salaries, wages and benefits	$	9,632	$	10,818
Accrual for insurance liabilities	5,233		5,223
Property taxes	513		1,615
Sales taxes	1,836		1,722
Interest	46		19
Other accrued expenses	613		549
	$	17,873	$	19,946