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Note 3 - Contracts in Progress (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Disaggregation of Revenue [Table Text Block]
(In thousands)
  
201
9
    
201
8
  
Category
                
Aerospace
   $
4,937
     $
8,115
  
Industrial
    
4,933
      
7,043
  
Research
    
3,114
      
4,114
  
Point in time
    
6,663
      
5,062
  
Total revenue
   $
19,647
     $
24,334
  
Schedule Of Cost And Estimated Earnings In Excess Of Billings [Table Text Block]
   
2019
    
2018
  
Costs incurred on contracts in progress
   $
6,943,067
     $
24,913,254
  
Estimated earnings
    
3,370,032
      
26,040,219
  
     
10,313,099
      
50,953,473
  
Billings to date
    
(10,645,800
 )    
(50,132,200
 )
    $
(332,701
 )   $
821,273
  
Included in accompanying balance sheets
                
Under the following captions:
                
Contract assets
   $
512,952
     $
1,357,797
  
Contract liabilities
   $
(845,653
 )   $
(536,524
 )