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ACCRUED LIABILITIES (Tables)
12 Months Ended
Dec. 31, 2016
Payables and Accruals [Abstract]  
Schedule of accrued liabilities
Accrued liabilities consisted of the following as of December 31, 2016 and 2015 (in thousands):
 
2016
 
2015
Accrued payroll and employee benefits
$
2,166

 
$
1,626

Accrued property taxes
748

 
594

Other
3,555

 
3,196

Total accrued liabilities
$
6,469

 
$
5,416