Note 2 - Revenue Recognition - Revenues Disaggregated by Geography (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 26,941	$ 24,261
UNITED STATES
Revenues	20,311	19,515
Americas [Member]
Revenues	213	356
Europe [Member]
Revenues	2,888	1,894
Asia [Member]
Revenues	3,529	2,496
Non-US [Member]
Revenues	$ 6,630	$ 4,746

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details