Note 14 - Activity of Business Segments - Consolidated Net Property and Equipment, Goodwill and Intangible Assets (Details) - USD ($) |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Consolidated assets | $ 8,289,000 | $ 8,575,000 |
| Operating Segments [Member] | ||
| Consolidated assets | 7,068,000 | 7,493,000 |
| Operating Segments [Member] | Building Supply [Member] | ||
| Consolidated assets | 5,617,000 | 6,069,000 |
| Operating Segments [Member] | Disposable Protective Apparel [Member] | ||
| Consolidated assets | 1,451,000 | 1,424,000 |
| Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | ||
| Consolidated assets | $ 1,221,000 | $ 1,082,000 |