Note 4 - Advances for Vessels Under Construction - Summary of Vessels Under Construction (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Balance, January 1, 2024 | $ 7,188,614 | $ 0 |
| Advances for vessels under construction | 7,183,182 | 7,188,614 |
| Other costs capitalized related to the construction | 14,764 | |
| Balance, December 31, 2024 | $ 14,386,560 | $ 7,188,614 |