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Note 10 - Segment Reporting - Reconciliation of Total Segment Income to Total Consolidated Net Income (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment net income	$ 613,000	$ 576,000
Provision for income taxes	159,000	146,000
Operating Segments [Member]
Segment net income	1,992,000	1,995,000
Operating Segments [Member] | Building Supply [Member]
Segment net income	1,056,000	963,000
Operating Segments [Member] | Disposable Protective Apparel [Member]
Segment net income	936,000	1,032,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Segment net income	$ 1,220,000	$ 1,273,000

X

- Definition

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

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