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Note 10 - Segment Data (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
    Three Months Ended March 31,
    2020   2019
(1)
Market   Net Sales   %   Net Sales   %
                 
Medical   $
33,688
     
69.8
%   $
28,944
     
61.2
%
Automotive    
4,602
     
9.5
%    
5,738
     
12.1
%
Consumer    
3,439
     
7.1
%    
4,424
     
9.3
%
Aerospace & Defense    
2,711
     
5.6
%    
3,532
     
7.5
%
Industrial    
1,917
     
4.0
%    
2,485
     
5.3
%
Electronics    
1,920
     
4.0
%    
2,204
     
4.7
%
Net Sales   $
48,277
     
100.0
%   $
47,327
     
100.0
%