Note 13 - Segments - Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net sales	$ 543,494	$ 465,771
Gross Profit	$ 134,383	$ 119,730
Gross Profit %	24.70%	25.70%
Total Assets	$ 511,846	$ 453,866
Capital Expenditures	9,397	5,476
Depreciation and amortization	16,861	16,423
Connectivity Solutions [Member]
Net sales	165,027	150,731
Gross Profit	$ 43,501	$ 42,200
Gross Profit %	26.40%	28.00%
Total Assets	$ 147,813	$ 137,333
Capital Expenditures	1,768	1,955
Depreciation and amortization	6,683	5,700
Power Solutions and Protection Segment [Member]
Net sales	218,035	181,488
Gross Profit	$ 58,823	$ 45,587
Gross Profit %	27.00%	25.10%
Total Assets	$ 206,719	$ 180,939
Capital Expenditures	4,718	2,458
Depreciation and amortization	8,022	8,611
Magnetic Solutions Segment [Member]
Net sales	160,432	133,552
Gross Profit	$ 34,106	$ 33,072
Gross Profit %	21.30%	24.80%
Total Assets	$ 104,845	$ 92,538
Capital Expenditures	2,911	1,063
Depreciation and amortization	2,126	2,112
Corporate Segment [Member]
Net sales	0	0
Gross Profit	(2,047)	(1,129)
Total Assets	52,469	43,056
Capital Expenditures	0	0
Depreciation and amortization	$ 30	$ 0