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Note 5 - Prepaid Expenses and Other Current Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] |
|  | December 31, |
|  | 2024 |  |  | 2023 |
Prepaid insurance |  | $ | 1,044 |  |  | $ | 1,012 |
Prepaid supplier expenses |  |  | 167 |  |  |  | 132 |
Other receivables |  |  | 204 |  |  |  | 159 |
Natural gas derivatives at fair value, current |  |  | 207 |  |  |  | — |
Deposits |  |  | 129 |  |  |  | 237 |
Other |  |  | 151 |  |  |  | 137 |
Total prepaid expenses and other current assets |  | $ | 1,902 |  |  | $ | 1,677 |

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- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration