Note 3 - Revenue - Disaggregation of Revenue by Product Group and Sales Channel (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue	$ 136,718	$ 110,643
Sales Channel, Directly to Consumer [Member]
Revenue	87,635	74,461
Sales Channel, Through Intermediary [Member]
Revenue	49,083	36,182
Connectivity Solutions [Member]
Revenue	43,713	38,056
Connectivity Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	26,053	23,637
Connectivity Solutions [Member] | Sales Channel, Through Intermediary [Member]
Revenue	17,660	14,419
Power Solutions and Protection [Member]
Revenue	58,790	43,641
Power Solutions and Protection [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	35,844	26,489
Power Solutions and Protection [Member] | Sales Channel, Through Intermediary [Member]
Revenue	22,946	17,152
Magnetic Solutions [Member]
Revenue	34,215	28,946
Magnetic Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Revenue	25,738	24,335
Magnetic Solutions [Member] | Sales Channel, Through Intermediary [Member]
Revenue	8,477	4,611
North America [Member]
Revenue	85,759	66,396
North America [Member] | Connectivity Solutions [Member]
Revenue	32,532	29,542
North America [Member] | Power Solutions and Protection [Member]
Revenue	42,349	29,777
North America [Member] | Magnetic Solutions [Member]
Revenue	10,878	7,077
Europe [Member]
Revenue	21,070	17,954
Europe [Member] | Connectivity Solutions [Member]
Revenue	9,214	6,747
Europe [Member] | Power Solutions and Protection [Member]
Revenue	9,385	9,959
Europe [Member] | Magnetic Solutions [Member]
Revenue	2,471	1,248
Asia [Member]
Revenue	29,889	26,293
Asia [Member] | Connectivity Solutions [Member]
Revenue	1,967	1,767
Asia [Member] | Power Solutions and Protection [Member]
Revenue	7,056	3,905
Asia [Member] | Magnetic Solutions [Member]
Revenue	$ 20,866	$ 20,621