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Note 8 - Segment Reporting (Tables)
3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
    Three Months Ended March 31,
    2017   2016
Market   Net Sales   %   Net Sales   %
Medical   $
17,459
     
47.1
%   $
15,614
     
45.3
%
Automotive    
6,719
     
18.1
%    
6,089
     
17.6
%
Consumer    
4,692
     
12.7
%    
4,629
     
13.4
%
Aerospace & Defense    
3,041
     
8.2
%    
2,572
     
7.5
%
Electronics    
2,692
     
7.3
%    
2,867
     
8.3
%
Industrial    
2,450
     
6.6
%    
2,732
     
7.9
%
Net Sales   $
37,053
     
100.0
%   $
34,503
     
100.0
%