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Note 10 - Segment Reporting - Net Sales by Market (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Net sales $ 42,644 $ 51,399 $ 90,921 $ 98,726
Percentage of concentration risk 100.00% 100.00% 100.00% 100.00%
Medical [Member]        
Net sales $ 31,657 $ 33,045 $ 65,345 $ 61,989
Percentage of concentration risk 74.20% 64.30% 71.90% 62.80%
Consumer [Member]        
Net sales $ 3,179 $ 4,667 $ 6,618 $ 9,092
Percentage of concentration risk 7.50% 9.10% 7.30% 9.20%
Aerospace & Defense [Member]        
Net sales $ 3,032 $ 4,115 $ 5,743 $ 7,646
Percentage of concentration risk 7.10% 8.00% 6.30% 7.70%
Industrial [Member]        
Net sales $ 2,143 $ 2,326 $ 4,059 $ 4,811
Percentage of concentration risk 5.00% 4.50% 4.40% 4.90%
Automotive [Member]        
Net sales $ 1,450 $ 4,950 $ 6,052 $ 10,688
Percentage of concentration risk 3.40% 9.60% 6.70% 10.80%
Electronics [Member]        
Net sales $ 1,183 $ 2,296 $ 3,104 $ 4,500
Percentage of concentration risk 2.80% 4.50% 3.40% 4.60%