Note 2 - Revenue Recognition - Revenues Disaggregated by Geography (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Revenues	$ 25,133	$ 27,081
UNITED STATES
Revenues	17,802	21,397
Americas [Member]
Revenues	924	577
Europe [Member]
Revenues	2,146	2,558
SOUTH AFRICA
Revenues	2,570	163
Pacific Rim and Other Geographical Areas [Member]
Revenues	1,691	2,386
Non-US [Member]
Revenues	$ 7,331	$ 5,684

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