Note 10 - Segments Reporting - Consolidated Net Property and Equipment, Goodwill and Intangible Assets (Details) - USD ($) |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Assets | $ 8,030,000 | $ 8,289,000 |
| Operating Segments [Member] | ||
| Assets | 6,739,000 | 7,068,000 |
| Operating Segments [Member] | Building Supply [Member] | ||
| Assets | 5,374,000 | 5,617,000 |
| Operating Segments [Member] | Disposable Protective Apparel [Member] | ||
| Assets | 1,365,000 | 1,451,000 |
| Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | ||
| Assets | $ 1,291,000 | $ 1,221,000 |