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Note C - Inventories (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
I
n
v
ento
r
ies-net
 
2015
 
 
2014
 
Raw materials and in-process
 
$
25,652
 
  $ 16,217  
Finished parts
 
 
46,270
 
    42,414  
Finished products
 
 
10,896
 
    36,129  
Total net inventories
 
$
82,818
 
  $ 94,760