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Note 10 - Segment Reporting - Net Sales by Market (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Net sales $ 50,655 $ 42,644 $ 99,254 $ 90,921
Percentage of concentration risk 100.00% 100.00% 100.00% 100.00%
Medical [Member]        
Net sales $ 32,606 $ 31,562 $ 62,721 $ 65,310
Percentage of concentration risk 64.40% 74.00% 63.20% 71.80%
Consumer [Member]        
Net sales $ 6,080 $ 3,230 $ 11,676 $ 6,695
Percentage of concentration risk 12.00% 7.60% 11.80% 7.40%
Aerospace & Defense [Member]        
Net sales $ 4,377 $ 3,111 $ 8,755 $ 5,834
Percentage of concentration risk 8.60% 7.30% 8.80% 6.40%
Automotive [Member]        
Net sales $ 3,567 $ 1,450 $ 8,214 $ 6,052
Percentage of concentration risk 7.00% 3.40% 8.30% 6.70%
Industrial [Member]        
Net sales $ 2,227 $ 2,165 $ 4,325 $ 4,076
Percentage of concentration risk 4.40% 5.10% 4.30% 4.50%
Electronics [Member]        
Net sales $ 1,798 $ 1,126 $ 3,563 $ 2,954
Percentage of concentration risk 3.50% 2.60% 3.60% 3.20%