Annual report pursuant to section 13 and 15(d)

TRADE RECEIVABLES (Tables)

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TRADE RECEIVABLES (Tables)
12 Months Ended
Dec. 31, 2012
TRADE RECEIVABLES [Abstract]  
Trade Receivables
Trade receivables, net, at December 31, 2012, and 2011, respectively, consisted of the following:

   
2012
   
2011
 
   
(thousands of dollars)
 
             
Trade receivables
  $ 16,012     $ 23,408  
Less allowance for doubtful accounts
    (210 )     (210 )
                 
Trade receivables, net
  $ 15,802     $ 23,198