Inventories (Major Components of Inventories) (Details) - USD ($) |
Sep. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Crude oil | $ 33,812,000 | $ 20,381,000 |
| NaHS | 7,713,000 | 10,902,000 |
| Caustic soda | 7,713,000 | 6,499,000 |
| Total | $ 49,238,000 | $ 37,782,000 |
| 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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