TRADE RECEIVABLES

3 Months Ended

Mar. 31, 2014

TRADE RECEIVABLES [Abstract]

TRADE RECEIVABLES

3. TRADE RECEIVABLES

Trade receivables, net, at March 31, 2014, and December 31, 2013, consisted of the following:

	March 31, 2014			December 31, 2013
	(thousands of dollars)
Trade receivables	$	24,659		$	22,279
Less allowance for doubtful accounts		(210	)		(210	)
Trade receivables, net	$	24,449		$	22,069

Trade receivables serving as collateral for our line of credit with a domestic bank were $19.8 million and $17.7 million at March 31, 2014, and December 31, 2013, respectively (see Note 7).