Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS (Details)

v3.6.0.2
FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Mar. 31, 2008
FAIR VALUE MEASUREMENTS [Abstract]        
Term loan secured by plant, pipeline and equipment       $ 10,000
Unrealized loss associated with the swap $ 378      
Recurring [Member]        
Liabilities [Abstract]        
Interest rate swap   $ 58 $ 177  
Recurring [Member] | Level 1 [Member]        
Liabilities [Abstract]        
Interest rate swap   0 0  
Recurring [Member] | Level 2 [Member]        
Liabilities [Abstract]        
Interest rate swap   58 177  
Recurring [Member] | Level 3 [Member]        
Liabilities [Abstract]        
Interest rate swap   $ 0 $ 0