Quarterly report pursuant to Section 13 or 15(d)

TRADE RECEIVABLES

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TRADE RECEIVABLES
9 Months Ended
Sep. 30, 2018
Receivables [Abstract]  
TRADE RECEIVABLES
TRADE RECEIVABLES

Trade receivables, net, consisted of the following:
 
 
September 30, 2018

 
December 31, 2017

 
 
(thousands of dollars)
Trade receivables
 
$
30,239

 
$
26,079

Less allowance for doubtful accounts
 
(452
)
 
(300
)
Trade receivables, net
 
$
29,787

 
$
25,779



Trade receivables serves as collateral for our amended and restated credit agreement. See Note 10.