Note 4 - Property, Plant and Equipment (Details Textual) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Depreciation | $ 17,406,603 | $ 15,797,205 |
| Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service | 4.50% | 4.40% |
| Minimum [Member] | ||
| Property, Plant and Equipment, Useful Life | 3 years | |
| Maximum [Member] | ||
| Property, Plant and Equipment, Useful Life | 25 years | |
| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
|
| X | ||||||||||
- Definition Composite depreciation rate for public utility plants in service. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|