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Note 4 - Property and Equipment (Tables)
6 Months Ended
Jun. 30, 2012
Property, Plant and Equipment [Table Text Block]
   
June 30,
2012
   
December 31,
2011
 
Construction equipment
  $ 135,511     $ 125,222  
Transportation equipment
    16,428       17,963  
Buildings
    7,186       4, 729  
Office equipment
    1,292       1,077  
Construction in progress
    1,051       2,544  
Land
    4,886       3,026  
Water rights
    200       200  
      166,554       154,761  
Less accumulated depreciation
    (64,151 )     (71,332 )
    $ 102,403     $ 83,429