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Contracts In Progress
12 Months Ended
Dec. 31, 2011
Contracts In Progress [Abstract]  
Contracts In Progress

6. CONTRACTS IN PROGRESS

A summary of contracts in progress at December 31 is as follows:

    2011     2010  
Costs incurred to date $ 4,158,690   $ 2,570,022  
Estimated earnings   1,957,728     971,684  
Revenue recognized to date   6,116,418     3,541,706  
Billings to date   (5,678,483 )   (3,098,788 )
  $ 437,935   $ 442,919  
Included in the accompanying balance sheets:            
Costs in excess of billings on uncompleted contracts            
(unbilled receivables) $ 638,950   $ 804,618  
Billings in excess of costs on uncompleted contracts   (201,015 )   (361,699 )
  $ 437,935   $ 442,919