Note 12 - Segments - Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net sales	$ 492,412	$ 548,184
Gross Profit	$ 110,697	$ 139,257
Gross Profit %	22.50%	25.40%
Total Assets	$ 468,917	$ 443,524
Capital Expenditures	9,891	11,594
Depreciation and amortization	16,471	18,207
Connectivity Solutions [Member]
Net sales	172,348	186,724
Gross Profit	$ 44,417	$ 55,092
Gross Profit %	25.80%	29.50%
Total Assets	$ 145,344	$ 140,240
Capital Expenditures	2,934	5,004
Depreciation and amortization	6,021	6,269
Power Solutions and Protection Segment [Member]
Net sales	163,528	176,053
Gross Profit	$ 32,846	$ 39,976
Gross Profit %	20.10%	22.70%
Total Assets	$ 168,422	$ 171,165
Capital Expenditures	4,570	3,661
Depreciation and amortization	7,858	9,225
Magnetic Solutions Segment [Member]
Net sales	156,536	185,407
Gross Profit	$ 34,350	$ 46,467
Gross Profit %	21.90%	25.10%
Total Assets	$ 89,463	$ 119,573
Capital Expenditures	2,387	2,929
Depreciation and amortization	2,592	2,713
Corporate Segment [Member]
Net sales
Gross Profit	(916)	(2,278)
Total Assets	65,688	12,546
Capital Expenditures
Depreciation and amortization