Note 5 - Other Long-Term Obligations and Commitments - Reconciliation of Liability of Plugging and Abandonment Costs (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Asset retirement obligation | $ 14,337 | ||||
| Dispositions | (4) | ||||
| Liabilities settled | (139) | ||||
| Accretion of discount on asset retirement obligations | $ 269 | $ 152 | 534 | $ 335 | |
| Asset retirement obligation | 14,728 | 14,728 | |||
| Less: Current portion included in Current portion of asset retirement and other long-term obligations | 1,682 | 1,682 | |||
| Long-term Asset Retirement Obligations included in Asset Retirement Obligations | $ 13,046 | $ 13,046 | $ 14,337 | ||