Note 3 - Revenue - Disaggregation of Revenue by Product Group and Sales Channel (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net sales	$ 543,494	$ 465,771
Sales Channel, Directly to Consumer [Member]
Net sales	365,156	318,150
Sales Channel, Through Intermediary [Member]
Net sales	178,338	147,621
Connectivity Solutions [Member]
Net sales	165,027	150,731
Connectivity Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	99,221	95,853
Connectivity Solutions [Member] | Sales Channel, Through Intermediary [Member]
Net sales	65,806	54,878
Power Solutions and Protection [Member]
Net sales	218,035	181,488
Power Solutions and Protection [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	134,635	113,570
Power Solutions and Protection [Member] | Sales Channel, Through Intermediary [Member]
Net sales	83,400	67,918
Magnetic Solutions [Member]
Net sales	160,432	133,552
Magnetic Solutions [Member] | Sales Channel, Directly to Consumer [Member]
Net sales	131,300	108,727
Magnetic Solutions [Member] | Sales Channel, Through Intermediary [Member]
Net sales	29,132	24,825
North America [Member]
Net sales	317,437	265,676
North America [Member] | Connectivity Solutions [Member]
Net sales	126,303	112,663
North America [Member] | Power Solutions and Protection [Member]
Net sales	152,799	123,014
North America [Member] | Magnetic Solutions [Member]
Net sales	38,335	29,999
Europe [Member]
Net sales	76,561	70,792
Europe [Member] | Connectivity Solutions [Member]
Net sales	30,241	30,017
Europe [Member] | Power Solutions and Protection [Member]
Net sales	38,068	34,447
Europe [Member] | Magnetic Solutions [Member]
Net sales	8,252	6,328
Asia [Member]
Net sales	149,496	129,303
Asia [Member] | Connectivity Solutions [Member]
Net sales	8,483	8,051
Asia [Member] | Power Solutions and Protection [Member]
Net sales	27,168	24,027
Asia [Member] | Magnetic Solutions [Member]
Net sales	$ 113,845	$ 97,225