Note 14 - Activity of Business Segments - Consolidated Net Sale (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Net sales	$ 57,840,000	$ 61,232,000
Operating Segments [Member] | Building Supply [Member]
Net sales	35,965,000	40,396,000
Operating Segments [Member] | Disposable Protective Apparel [Member]
Net sales	$ 21,875,000	$ 20,836,000