Note 10 - Retirement Plans (Details Textual) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Defined Contribution Plan, Cost | $ 87,244 | $ 97,845 |
| Defined Benefit Plan, Equity Securities [Member] | ||
| Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 34.10% | |
| Defined Benefit Plan, Debt Security [Member] | ||
| Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 36.30% | |
| Employee Benefit Plan, Real Estate [Member] | ||
| Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 17.70% | |
| Alternative Investment Member] | ||
| Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 7.60% | |
| Defined Benefit Plan, Cash and Cash Equivalents [Member] | ||
| Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 4.30% | |