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Note 14 - Segments - Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue	$ 121,172	$ 127,416	$ 225,149	$ 252,805
Gross Profit	$ 31,769	$ 26,746	$ 56,880	$ 57,480
Gross Profit %	26.20%	21.00%	25.30%	22.70%
Connectivity Solutions [Member]
Revenue	$ 38,908	$ 42,536	$ 78,007	$ 86,897
Gross Profit	$ 11,531	$ 10,135	$ 22,698	$ 22,450
Gross Profit %	29.60%	23.80%	29.10%	25.80%
Power Solutions and Protection Segment [Member]
Revenue	$ 45,112	$ 44,028	$ 81,289	$ 86,800
Gross Profit	$ 10,615	$ 8,876	$ 19,523	$ 18,855
Gross Profit %	23.50%	20.20%	24.00%	21.70%
Magnetic Solutions Segment [Member]
Revenue	$ 37,152	$ 40,852	$ 65,853	$ 79,108
Gross Profit	$ 9,445	$ 8,180	$ 15,438	$ 16,708
Gross Profit %	25.40%	20.00%	23.40%	21.10%
Corporate Segment [Member]
Revenue	$ 0	$ 0	$ 0	$ 0
Gross Profit	$ 178	$ (445)	$ (779)	$ (533)

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