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Note 10 - Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Derivative Instruments, Gain (Loss) [Table Text Block] |
|  |  |  | Amount of gain/loss recognized in income |
(Thousands of dollars) |  | Location of gain/loss recognized in income |  | 2024 |  |  | 2023 |
Derivatives not designated as cash-flow hedge instruments: |  |  |  |  |  |  |  |  |  |
Natural gas commodity contracts |  | Gain on derivative instruments, net |  |  | 0 |  |  |  | 235 |
Crude oil commodity contracts |  | Gain on derivative instruments, net |  |  | 0 |  |  |  | 179 |
|  |  |  | $ | 0 |  |  | $ | 414 |

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