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Note 10 - Segment Reporting - Net Sales by Market (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Net sales $ 48,599 $ 48,277
Percentage of concentration risk 100.00% 100.00%
Medical [Member]    
Net sales $ 29,863 $ 33,732
Percentage of concentration risk 61.40% 69.90%
Consumer [Member]    
Net sales $ 5,596 $ 3,453
Percentage of concentration risk 11.50% 7.20%
Automotive [Member]    
Net sales $ 4,646 $ 4,602
Percentage of concentration risk 9.60% 9.50%
Aerospace & Defense [Member]    
Net sales $ 4,631 $ 2,752
Percentage of concentration risk 9.50% 5.70%
Industrial [Member]    
Net sales $ 2,098 $ 1,910
Percentage of concentration risk 4.30% 4.00%
Electronics [Member]    
Net sales $ 1,765 $ 1,828
Percentage of concentration risk 3.60% 3.80%