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Segment Information (Tables)
 3 Months Ended
Mar. 31, 2018
Segment Information [Abstract]  
Schedule of financial information by reportable segment

The following tables set forth selected unaudited financial information for each of our reportable segments (in thousands):

 

Three Months Ended March 31,

 

Intersection

Highway

Total

 

2018

  

2017

  

2018

  

2017

  

2018

2017
                                     

Revenue

$

2,417

  

$

1,904

  

$

593

  

$

1,180

  

$

3,010

  

$

3,084

Gross profit

2,186

    

1,735

    

377

    

715

    

2,563

    

2,450

Amortization of intangible assets

  

92

    

90

    

19

    

—

    

111

    

90

Intangible assets

  

2,385

    

2,772

    

1,055

    

107

    

3,440

    

2,879