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Note 4 - Contracts in Progress (Tables)
 12 Months Ended
Nov. 30, 2020
Notes Tables  
Long-Term Contract or Program Disclosure [Table Text Block]
   
Cost and Profit in
    
Billings in Excess of
  
   
Excess of Billings
    
Costs and Profit
  
November 30, 2020
                
Costs
   $
511,152
     $
9,697,061
  
Estimated earnings
    
98,084
      
579,747
  
     
609,236
      
10,276,808
  
Less: amounts billed
    
(553,210
 )    
(10,553,034
 )
    $
56,026
     $
(276,226
 )
                 
November 30, 2019
                
Costs
   $
3,805,906
     $
629,501
  
Estimated earnings
    
1,044,612
      
155,790
  
     
4,850,518
      
785,291
  
Less: amounts billed
    
(4,123,851
 )    
(874,222
 )
    $
726,667
     $
(88,931
 )