Note 13 - Major Customers and Related Information - Disaggregation of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Revenues	$ 711	$ 1,599
Americas [Member]
Revenues	710	1,194
Europe, Middle East and Africa [Member]
Revenues	1	174
Asia Pacific [Member]
Revenues	$ 0	$ 231

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).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details