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Note 16 - Concentration of Risk and Enterprise-wide Disclosures
 12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Segment Reporting Disclosure [Text Block]
16.
 Concentration of Risk and Enterprise-Wide Disclosures
 
The following table shows contract revenues generated from the Company’s customers that accounted for more than
10%
of revenues (amounts in thousands):
 
    Years Ended December 31,
    2016   2015   2014
    Amount   %   Amount   %   Amount   %
California Department of Transportation (“Caltrans”)   $
88,627
      
12.8
 %   $
96,470
      
15.5
 %   $
97,637
      
14.5
 %
Texas Department of Transportation (“TXDOT”)    
85,224
      
12.4
    
84,129
      
13.5
    
*
      
*
  
Utah Department of Transportation (“UDOT”)    
79,421
      
11.5
      
*
      
*
      
*
      
*
  
 
*Represents less than
10%
of revenues
 
At
December
31,
2016,
the Texas Department of Transportation (TXDOT) owed the Company
$7.9
million which was greater than
10%
of contracts receivable. At
December
31,
2015,
there were
no
customers who owed the Company amounts greater than
10%
of contract receivables.
 
The Company’s revenue and receivables are entirely derived from the construction of U.S. projects and all of the Company’s assets are held domestically within the U.S.
 
A portion of our labor force is subject to collective bargaining agreements. Refer to Note
15
for further information regarding this concentration of risk.