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Note 11 - Segment Information, Significant Customers, Industry Concentration and Geographic Areas
12 Months Ended
Dec. 31, 2018
Notes to Financial Statements  
Segment Reporting and Concentration Risk Disclosure [Text Block]
11.
SEGMENT INFORMATION, SIGNIFICANT CUSTOMERS, INDUSTRY CONCENTRATION AND GEOGRAPHIC AREAS
 
The Company's revenues for
2018,
2017
and
2016
were all generated from operations in the motor carrier segment and are aggregated into a single reporting segment in accordance with the aggregation criteria under GAAP.
 
The table below presents revenue dollars and percentages by geographic area:
 
   
Year ended December 31,
 
   
2018
   
2017
   
2016
 
   
(in thousands)
 
   
Amount
   
Percent
   
Amount
   
Percent
   
Amount
   
Percent
 
United States - domestic shipments
  $
302,754
     
56.8
    $
255,197
     
58.3
    $
251,390
     
58.1
 
Shipments to or from Mexico
   
229,350
     
43.0
     
181,099
     
41.4
     
181,159
     
41.9
 
Shipments to or from Canada
   
1,157
     
0.2
     
1,542
     
0.3
     
303
     
-
 
                                                 
Total Operating Revenues
  $
533,261
     
100
%    
437,838
     
100
%   $
432,852
     
100
%
 
Our
five
largest customers, for which we provide carrier services covering a number of geographic locations, accounted for approximately
42%,
41%
and
43%
of our total revenues in
2018,
2017
and
2016,
respectively. Fiat Chrysler Automobiles accounted for approximately
16%,
10%
and
9%
of our revenues in
2018,
2017
and
2016,
respectively. General Motors Company accounted for approximately
13%,
18%
and
18%
of our revenues in
2018,
2017
and
2016,
respectively. Ford Motor Company accounted for approximately
8%,
9%
and
10%
of our revenues in
2018,
2017
and
2016,
respectively.
 
We also provide transportation services to other manufacturers who are suppliers for automobile manufacturers. Approximately
46%,
46%
and
45%
of our revenues were derived from transportation services provided to the automobile industry during
2018,
2017
and
2016,
respectively.
 
Accounts receivable from the
three
largest customers totaled approximately
$30,848,000
and
$29,788,000
at
December 31, 2018
and
2017,
respectively.