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Costs and Estimated Earnings on Uncompleted Contracts (Tables)
 12 Months Ended
Dec. 31, 2011
Costs and Estimated Earnings on Uncompleted Contracts [Abstract]  
Costs and estimated earnings on uncompleted contracts consist
                 
    December 31,  
    2011     2010  

Costs incurred on uncompleted contracts

   $ 5,839     $ 6,676  

Estimated earnings

     3,775       4,665  
   

 

 

    

 

 

  
      9,614       11,341  

Less: Billings to date

     9,886       11,037  
   

 

 

    

 

 

  
    $ (272 )    $ 304  
   

 

 

    

 

 

  

Costs and estimated earnings in excess of billings on uncompleted contracts

   $ 593     $ 815  

Billings in excess of costs and estimated earnings on uncompleted contracts

     (865 )      (511 ) 
   

 

 

    

 

 

  
    $ (272 )    $ 304