Note 13 - Major Customers and Related Information - Disaggregation of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues	$ 1,701	$ 1,805	$ 4,464	$ 5,280
Americas [Member]
Revenues	1,478	1,088	3,484	2,837
Europe, Middle East and Africa [Member]
Revenues	220	745	435	2,424
Asia Pacific [Member]
Revenues	$ 3	$ (28)	$ 545	$ 19

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