Note 12 - Business Segment and Geographic Financial Data - Geographic Segment Financial Data (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Revenues	$ 25,133	$ 27,081
Assets	48,797	50,388
UNITED STATES
Revenues	17,802	21,397
Assets	44,430	46,487
Non-US [Member]
Revenues	7,331	5,684
Assets	$ 4,367	$ 3,901

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