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Note 17 - Customers
 12 Months Ended
Dec. 31, 2013
Segment Reporting [Abstract]  
Segment Reporting Disclosure [Text Block]
17.
Customers

The following table shows contract revenues generated from the Company’s customers that accounted for more than 10% of revenues (dollars in thousands):

      Years Ended December 31,  
   
2013
   
2012
   
2011
 
   
Amount
   
%
   
Amount
   
%
   
Amount
   
%
 
Texas Department of Transportation (“TxDOT”)
  $ *       * %   $ *       * %   $ 75,818       15.1 %
Utah Department of Transportation (“UDOT”)
    *       *       100,658       16.0       144,398       28.8  
California Department of Transportation (“Caltrans”)
    92,159       16.6       94,171       15.0       *       *  

*Represents less than 10% of revenues

At December 31, 2013, Central Texas Mobility Constructors (“CTMC”) owed $16.3 million, Foursquare Properties Inc. owed $11.4 million and City of Honolulu owed $10.0 million to the Company, which is greater than 10% of contract receivables.  At December 31, 2012, North Texas Tollway Authority (“NTTA”) owed $8.8 million to the Company, which is greater than 10% of contract receivables.  At December 31, 2011, UDOT owed $8.8 million to the Company, which is greater than 10% of contract receivables.