XML 92 R50.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
PROPERTY, PLANT AND EQUIPMENT    
Gross property, plant and equipment $ 43,054 $ 40,765
Less: accumulated depreciation (28,258) (26,213)
Net property, plant and equipment 14,796 14,552
Land    
PROPERTY, PLANT AND EQUIPMENT    
Gross property, plant and equipment 878 878
Buildings    
PROPERTY, PLANT AND EQUIPMENT    
Gross property, plant and equipment $ 20,552 19,705
Buildings | Minimum    
PROPERTY, PLANT AND EQUIPMENT    
Estimated Useful Lives 7 years  
Buildings | Maximum    
PROPERTY, PLANT AND EQUIPMENT    
Estimated Useful Lives 40 years  
Operating equipment and property    
PROPERTY, PLANT AND EQUIPMENT    
Gross property, plant and equipment $ 11,891 11,016
Operating equipment and property | Minimum    
PROPERTY, PLANT AND EQUIPMENT    
Estimated Useful Lives 3 years  
Operating equipment and property | Maximum    
PROPERTY, PLANT AND EQUIPMENT    
Estimated Useful Lives 15 years  
Furniture and fixtures    
PROPERTY, PLANT AND EQUIPMENT    
Gross property, plant and equipment $ 1,999 1,785
Furniture and fixtures | Minimum    
PROPERTY, PLANT AND EQUIPMENT    
Estimated Useful Lives 5 years  
Furniture and fixtures | Maximum    
PROPERTY, PLANT AND EQUIPMENT    
Estimated Useful Lives 7 years  
Vehicles    
PROPERTY, PLANT AND EQUIPMENT    
Gross property, plant and equipment $ 7,734 $ 7,381
Vehicles | Minimum    
PROPERTY, PLANT AND EQUIPMENT    
Estimated Useful Lives 5 years  
Vehicles | Maximum    
PROPERTY, PLANT AND EQUIPMENT    
Estimated Useful Lives 10 years