Note 3 - Revenue Recognition 1 (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Increase (Decrease) in Contract with Customer, Liability | $ (524) | $ 3,142 | ||||
| Contract with Customer, Liability, Revenue Recognized | $ 366 | $ 80 | 711 | 110 | ||
| Contract With Customer, Liability Revenue Recognized Including Previous Deferred Revenue Balance | 523 | 106 | ||||
| Accounts Receivable, Blenders' Tax Credit | 0 | 0 | 0 | 0 | $ 0 | $ 6,683 |
| Accounts Receivable, Clean Fuel and Small Agri-Biodiesel Tax Credits | 2,800 | 0 | 2,800 | 0 | 0 | 0 |
| Accounts Receivable, Allowance for Credit Loss | 36 | 44 | 36 | 44 | 28 | $ 29 |
| Revenue, Remaining Performance Obligation, Amount | 26,272 | 26,272 | ||||
| Bill and Hold Arrangements [Member] | ||||||
| Contract with Customer, Liability | 4,357 | 4,357 | $ 5,106 | |||
| Chemicals [Member] | ||||||
| Increase (Decrease) in Contract with Customer, Liability | 125 | 188 | 125 | |||
| Warehouse Space [Member] | ||||||
| Short-Term Lease, Cost | $ 170 | $ 170 | $ 340 | $ 340 | ||
| X | ||||||||||
- Definition The amount of blenders' tax credit attributable to accounts receivable. No definition available.
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| X | ||||||||||
- Definition The amount of CFPC and SPTC attributable to accounts receivable. No definition available.
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| X | ||||||||||
- Definition The amount of revenue recognized from the contract with customer including the previous deferred revenue. No definition available.
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| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of short-term lease cost, excluding expense for lease with term of one month or less. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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