Note 13 - Major Customers and Related Information - Disaggregation of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Revenues	$ 1,599	$ 1,542
Americas [Member]
Revenues	1,194	626
Europe, Middle East and Africa [Member]
Revenues	174	877
Asia Pacific [Member]
Revenues	$ 231	$ 39

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