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Note 5 - Prepaid Expenses and Other Current Assets - Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Prepaid insurance $ 350 $ 990
Prepaid supplier expenses 167 286
Other receivables 182 254
Natural gas derivatives at fair value, current 81 347
Deposits 203 236
Other 68 73
Total prepaid expenses and other current assets $ 1,051 $ 2,186