Note 14 - Activity of Business Segments - Reconciliation of Total Segment Income to Total Consolidated Net Income (Details) - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Income	$ 3,531,000	$ 3,929,000
Provision for income taxes	1,138,000	1,091,000
Operating Segments [Member]
Income	9,644,000	10,227,000
Operating Segments [Member] \| Building Supply [Member]
Income	5,466,000	5,746,000
Operating Segments [Member] \| Disposable Protective Apparel [Member]
Income	4,178,000	4,481,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Income	$ 4,975,000	$ 5,207,000

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details