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Note 7 - Property and Equipment
12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]
7.  
Property and Equipment

Property and equipment are summarized as follows (amounts in thousands):

   
As of December 31,
 
   
2014
    2013  
Construction equipment
  $ 129,150     $ 127,199  
Transportation equipment
    18,205       19,132  
Buildings
    10,777       10,512  
Office equipment
    2,761       2,025  
Leasehold Improvement
    878       816  
Construction in progress
    387       -  
Land
    5,530       5,309  
Water rights
    200       200  
      167,888       165,193  
Less accumulated depreciation
    (80,790 )     (71,510 )
    $ 87,098     $ 93,683