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Note 4 - Contracts in Progress (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule Of Cost And Estimated Earnings In Excess Of Billings [Table Text Block]
   
September 30, 2016
   
December 31, 2015
 
                 
Costs incurred on contracts in progress
  $ 4,847,325     $ 7,695,281  
Estimated earnings
    14,091,572       7,635,114  
      18,938,897       15,330,395  
Less: Billings to date
    (24,909,939 )     (10,695,377 )
    $ (5,971,042 )   $ 4,635,018  
Included in accompanying balance sheets
under the following captions:
               
                 
Costs and estimated earnings in excess of billings on contracts in progress   $ 3,159,828     $ 4,635,018  
                 
Billings in excess of costs and estimated earnings on contracts in progress     (9,130,870 )     ---  
    $ (5,971,042 )   $ 4,635,018