TRADE RECEIVABLES

6 Months Ended

Jun. 30, 2017

TRADE RECEIVABLES [Abstract]

TRADE RECEIVABLES

3. TRADE RECEIVABLES

Trade receivables, net, consisted of the following:

	June 30, 2017			December 31, 2016
	(thousands of dollars)
Trade receivables	$	25,332		$	22,493
Less allowance for doubtful accounts		(300	)		(300	)
Trade receivables, net	$	25,032		$	22,193

Trade receivables serves as collateral for our amended and restated credit agreement. See Note 9.