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Note 11 - Business Segment Information - Components of Customer Sales Determined Based on the Location of Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net sales	$ 348,967	$ 398,179	$ 414,334
UNITED STATES
Net sales	246,913	275,290	271,820
Foreign Countries [Member]
Net sales	$ 102,054	$ 122,889	$ 142,514

X

- Definition

Amount, including 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.

+ References

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