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Note 4 - Prepaid Expenses and Other Current Assets - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Prepaid insurance | $ 1,196 | $ 1,012
Prepaid supplier expenses | 194 | 132
Other receivables | 185 | 159
Natural gas derivatives at fair value, current | 236 | 0
Deposits | 129 | 237
Other | 132 | 137
Total prepaid expenses and other current assets | $ 2,072 | $ 1,677

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