Note 3 - Revenue - Disaggregation of Revenue by Product Group and Sales Channel (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net sales	$ 170,572	$ 138,741	$ 307,290	$ 249,385
Sales Channel, Directly to Consumer [Member]
Net sales	113,663	92,647	201,298	167,109
Sales Channel, Through Intermediary [Member]
Net sales	56,909	46,094	105,992	82,276
Connectivity Solutions [Member]
Net sales	46,096	43,046	89,809	81,102
Connectivity Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	28,544	25,785	54,597	49,422
Connectivity Solutions [Member] | Sales Channel, Through Intermediary [Member]
Net sales	17,552	17,261	35,212	31,680
Power Solutions and Protection [Member]
Net sales	71,026	55,390	129,815	99,031
Power Solutions and Protection [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	45,604	34,116	81,447	60,605
Power Solutions and Protection [Member] | Sales Channel, Through Intermediary [Member]
Net sales	25,422	21,274	48,368	38,426
Magnetic Solutions [Member]
Net sales	53,450	40,305	87,666	69,252
Magnetic Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	39,515	32,746	65,254	57,082
Magnetic Solutions [Member] | Sales Channel, Through Intermediary [Member]
Net sales	13,935	7,559	22,412	12,170
North America [Member]
Net sales	101,436	80,643	187,194	147,039
North America [Member] | Connectivity Solutions [Member]
Net sales	34,781	33,182	67,313	62,724
North America [Member] | Power Solutions and Protection [Member]
Net sales	52,407	37,867	94,755	67,644
North America [Member] | Magnetic Solutions [Member]
Net sales	14,248	9,594	25,126	16,671
Europe [Member]
Net sales	22,576	19,467	43,646	37,422
Europe [Member] | Connectivity Solutions [Member]
Net sales	8,354	7,557	17,568	14,304
Europe [Member] | Power Solutions and Protection [Member]
Net sales	11,101	9,668	20,486	19,627
Europe [Member] | Magnetic Solutions [Member]
Net sales	3,121	2,242	5,592	3,491
Asia [Member]
Net sales	46,560	38,631	76,450	64,924
Asia [Member] | Connectivity Solutions [Member]
Net sales	2,961	2,307	4,928	4,074
Asia [Member] | Power Solutions and Protection [Member]
Net sales	7,518	7,855	14,574	11,760
Asia [Member] | Magnetic Solutions [Member]
Net sales	$ 36,081	$ 28,469	$ 56,948	$ 49,090