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Note 3 - Revenue - Disaggregation of Revenue by Product Group and Sales Channel (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
Sales Channel, Directly to Consumer [Member]
Revenue	81,515	91,442	152,486	182,664
Sales Channel, Through Intermediary [Member]
Revenue	39,657	35,974	72,663	70,141
Connectivity Solutions [Member]
Revenue	38,908	42,536	78,007	86,897
Connectivity Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	23,600	28,207	48,652	57,812
Connectivity Solutions [Member] | Sales Channel, Through Intermediary [Member]
Revenue	15,308	14,329	29,355	29,085
Power Solutions and Protection [Member]
Revenue	45,112	44,028	81,289	86,800
Power Solutions and Protection [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	26,894	28,594	48,471	57,694
Power Solutions and Protection [Member] | Sales Channel, Through Intermediary [Member]
Revenue	18,218	15,434	32,818	29,106
Magnetic Solutions [Member]
Revenue	37,152	40,852	65,853	79,108
Magnetic Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	31,021	34,641	55,363	67,158
Magnetic Solutions [Member] | Sales Channel, Through Intermediary [Member]
Revenue	6,131	6,211	10,490	11,950
North America [Member]
Revenue	63,734	67,066	123,266	131,653
North America [Member] | Connectivity Solutions [Member]
Revenue	27,608	31,297	57,310	63,418
North America [Member] | Power Solutions and Protection [Member]
Revenue	29,029	26,131	51,752	49,652
North America [Member] | Magnetic Solutions [Member]
Revenue	7,097	9,638	14,204	18,583
Europe [Member]
Revenue	19,038	21,026	37,315	44,551
Europe [Member] | Connectivity Solutions [Member]
Revenue	8,356	8,212	16,118	16,977
Europe [Member] | Power Solutions and Protection [Member]
Revenue	8,965	10,768	18,279	23,307
Europe [Member] | Magnetic Solutions [Member]
Revenue	1,717	2,046	2,918	4,267
Asia [Member]
Revenue	38,400	39,324	64,568	76,601
Asia [Member] | Connectivity Solutions [Member]
Revenue	2,944	3,027	4,579	6,502
Asia [Member] | Power Solutions and Protection [Member]
Revenue	7,118	7,129	11,258	13,841
Asia [Member] | Magnetic Solutions [Member]
Revenue	$ 28,338	$ 29,168	$ 48,731	$ 56,258

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

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