Note 15 - Major Customers and Related Information - Disaggregation of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues	$ 593	$ 3,631	$ 3,642	$ 5,544
Americas [Member]
Revenues	585	1,347	3,583	3,225
Europe, Middle East and Africa [Member]
Revenues	7	2,284	51	2,320
Asia Pacific [Member]
Revenues	$ 1	$ 0	$ 8	$ (1)

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details