Inventories (Major Components of Inventories) (Details) - USD ($) |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Crude oil | $ 16,949,000 | $ 33,665,000 |
| NaHS | 13,382,000 | 13,247,000 |
| Caustic soda | 8,258,000 | 8,454,000 |
| Total | $ 38,589,000 | $ 55,366,000 |
| X | ||||||||||
- Definition Carrying amount of caustic soda as of the balance sheet date. No definition available.
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| X | ||||||||||
- Definition Carrying amount of sodium hydrosulfide (NaHS) as of the balance sheet date. No definition available.
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| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of finished goods inventories for petroleum products, crude oil, petrochemical products, and other oil and gas inventories. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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