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Note 10 - Segment Reporting - Net Sales by Market (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
[1]
Sep. 30, 2021
Sep. 30, 2020
[1]
Net sales $ 50,723 $ 43,299 $ 149,977 $ 134,220
Percentage of concentration risk 100.00% 100.00% 100.00% 100.00%
Medical [Member]        
Net sales $ 32,380 $ 26,869 $ 95,100 $ 92,179
Percentage of concentration risk 63.80% 62.10% 63.40% 68.70%
Consumer [Member]        
Net sales $ 6,449 $ 5,581 $ 18,125 $ 12,216
Percentage of concentration risk 12.70% 12.90% 12.10% 9.10%
Aerospace & Defense [Member]        
Net sales $ 3,873 $ 3,388 $ 12,628 $ 9,223
Percentage of concentration risk 7.60% 7.80% 8.40% 6.90%
Automotive [Member]        
Net sales $ 3,851 $ 4,473 $ 12,065 $ 10,525
Percentage of concentration risk 7.60% 10.30% 8.00% 7.80%
Industrial [Member]        
Net sales $ 2,168 $ 1,765 $ 6,494 $ 5,840
Percentage of concentration risk 4.30% 4.10% 4.20% 4.40%
Electronics [Member]        
Net sales $ 2,002 $ 1,223 $ 5,565 $ 4,237
Percentage of concentration risk 3.90% 2.80% 3.70% 3.20%
[1] Certain amounts for the three and nine months ended September 30, 2021 were reclassified between markets to conform to the current period presentation.