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Note 4 - Uncompleted Contracts (Tables)
 9 Months Ended
Sep. 30, 2012
Schedule of Cost and Estimated Earnings In Excess of Billings [Table Text Block]
   
September 30, 2012
   
December 31, 2011
 
             
Costs incurred on uncompleted contracts
  $ 11,579,972     $ 11,253,624  
Estimated earnings
    10,539,240       10,120,760  
      22,119,212       21,374,384  
Billings to date
    (18,951,405 )     (19,650,770 )
    $ 3,167,807     $ 1,723,614  
Included in accompanying balance sheets under the following captions:
               
Costs and estimated earnings in excess of billings on uncompleted contracts
  $
3,254,012
    $
3,410,824
 
                 
Billings in excess of costs and estimated earnings on uncompleted contracts
  $
(86,205
)   $
(1,687,210
)