Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies (Details Textual)

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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Revenue from Contract with Customer, Excluding Assessed Tax $ 0 $ 25 $ 0 $ 25  
Accounts Receivable, after Allowance for Credit Loss, Current 486   486   $ 67
Trade Accounts Receivable [Member]          
Accounts Receivable, after Allowance for Credit Loss, Current 0   0   $ 0
Sale of Inventory [Member]          
Revenue from Contract with Customer, Excluding Assessed Tax $ 0 $ 0 $ 0 $ 0