Note 10 - Activity of Business Segments - Consolidated Net Sales (Details) - USD ($)	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Net sales	$ 13,482,000	$ 13,800,000
Operating Segments [Member] \| Building Supply [Member]
Net sales	8,240,000	8,631,000
Operating Segments [Member] \| Disposable Protective Apparel [Member]
Net sales	$ 5,242,000	$ 5,169,000

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.

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+ Details