Note 15 - Major Customers and Related Information - Disaggregation of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Revenues	$ 1,476	$ 711
Americas [Member]
Revenues	1,463	710
Europe, Middle East and Africa [Member]
Revenues	6	1
Asia Pacific [Member]
Revenues	$ 7	$ 0

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