Note 4 - Related Party Transactions (Details Textual) - USD ($) |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Purchase of Fuel, Tires and Related Services [Member] | ||
| Related Party Transaction, Amounts of Transaction | $ 13,000 | $ 14,000 |
| Tire Purchases [Member] | ||
| Related Party Transaction, Amounts of Transaction | $ 613,000 | 1,200,000 |
| Building Repairs [Member] | ||
| Related Party Transaction, Amounts of Transaction | $ 7,000 | |