Note 14 - Domestic and Foreign Revenues - Schedule of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net sales	$ 531	$ 403	$ 923	$ 844
SPAIN
Net sales	56	236	104	236
INDIA
Net sales	15	0	99	23
ROMANIA
Net sales	0	0	94	0
AUSTRALIA
Net sales	87	5	87	5
CANADA
Net sales	11	47	12	90
All Other Foreign Countries [Member]
Net sales	15	46	47	57
Non-US [Member]
Net sales	184	334	443	411
UNITED STATES
Net sales	$ 347	$ 69	$ 480	$ 433

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.

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+ Details