TRADE RECEIVABLES

9 Months Ended

Sep. 30, 2013

TRADE RECEIVABLES [Abstract]

TRADE RECEIVABLES

4. TRADE RECEIVABLES

Trade receivables, net, consisted of the following:

	September 30, 2013			December 31, 2012
	(thousands of dollars)
Trade receivables	$	20,530		$	16,012
Less allowance for doubtful accounts		(210	)		(210	)
Trade receivables, net	$	20,320		$	15,802

Trade receivables serving as collateral for the Company’s line of credit with a domestic bank were $15.7 million and $11.7 million at September 30, 2013, and December 31, 2012, respectively (see Note 8).