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Note 10 - Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
December 31, 2022 |  | Quoted Prices in Active Markets For Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |  |  | Balance at December 31, 2022 |
(Thousands of dollars) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity derivative contracts |  | $ | — |  |  | $ | — |  |  | $ | 210 |  |  | $ | 210 |
Total assets |  | $ | — |  |  | $ | — |  |  | $ | 210 |  |  | $ | 210 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity derivative contract |  | $ | — |  |  | $ | — |  |  | $ | (1,190 | ) |  | $ | (1,190 | )
Total liabilities |  | $ | — |  |  | $ | — |  |  | $ | (1,190 | ) |  | $ | (1,190 | )
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
(Thousands of dollars) |  |  |  |
Net Liabilities – December 31, 2022 |  | $ | (980 | )
Total realized and unrealized gains |  |  | 980 |
Net Liabilities – December 31, 2023 |  | $ | — |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] |
|  |  | Fair Value |
(Thousands of dollars) | Balance Sheet Location |  | December 31, 2023 |  |  | December 31, 2022 |
Asset Derivatives: |  |  |  |  |  |  |  |  |
Derivatives not designated as cash-flow hedging instruments: |  |  |  |  |  |  |  |  |
Crude oil commodity contract | Other current assets |  | $ | — |  |  | $ | 162 |
Natural gas commodity contract | Other current assets |  |  | — |  |  |  | 48 |
Total |  | $ | — |  |  | $ | 210 |
Liability Derivatives: |  |  |  |  |  |  |  |  |
Derivatives not designated as cash-flow hedging instruments: |  |  |  |  |  |  |  |  |
Crude oil commodity contracts | Derivative liability short-term |  | $ | — |  |  | $ | (931 | )
Natural gas commodity contracts | Derivative liability short-term |  |  | — |  |  |  | (259 | )
Total |  | $ | — |  |  | $ | (1,190 | )
Total derivative instruments |  | $ | — |  |  | $ | (980 | )
Derivative Instruments, Gain (Loss) [Table Text Block] |
|  |  |  | Amount of gain/loss recognized in income |
(Thousands of dollars) |  | Location of gain/loss recognized in income |  | 2023 |  |  | 2022 |
Derivatives not designated as cash-flow hedge instruments: |  |  |  |  |  |  |  |  |  |
Natural gas commodity contracts |  | Unrealized gain on derivative instruments, net |  |  | — |  |  |  | 892 |
Crude oil commodity contracts |  | Unrealized gain on derivative instruments, net |  |  | — |  |  |  | 3,713 |
Natural gas commodity contracts |  | Realized gain (loss) on derivative instruments, net |  |  | 235 |  |  |  | (4,543 | )
Crude oil commodity contracts |  | Realized gain (loss) on derivative instruments, net |  |  | 179 |  |  |  | (12,101 | )
|  |  |  | $ | 414 |  |  | $ | (12,039 | )

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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