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Note A - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Property, Plant and Equipment [Table Text Block]
Buildings (in years) 
 20
 -
50
Machinery and equipment (in years)  
 5
 -
15
Software (in years) 
 3
 -
5
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Technology and drawings (in years) 
13
-
20
Customer relationships (in years)  
9
-
15
Other intangibles (in years) 
2
-
18
Schedule of Product Warranty Liability [Table Text Block]
 
 
2015
 
 
2014
 
 
2013
 
Balance at beginning of year
 
$
1,166
 
  $ 1,170     $ 1,133  
Provision
 
 
1,732
 
    1,607       1,220  
Claims
 
 
(1,518
)
    (1,611 )     (1,183 )
Balance at end of year
 
$
1,380
 
  $ 1,166     $ 1,170