Note 12 - Segments - Net Sales to External Customers by Geographic Area and by Major Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 465,771	$ 492,412
Connectivity Solutions [Member]
Net sales	150,731	172,348
Magnetic Solutions [Member]
Net sales	133,552	156,536
Power Solutions and Protection [Member]
Net sales	181,488	163,528
UNITED STATES
Net sales	265,676	256,044
MACAU
Net sales	129,303	154,745
UNITED KINGDOM
Net sales	22,017	24,877
SLOVAKIA
Net sales	17,609	22,705
GERMANY
Net sales	13,582	14,855
SWITZERLAND
Net sales	8,612	10,654
All Other Foreign Countries [Member]
Net sales	$ 8,972	$ 8,532

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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