Note 9 - Segment Reporting - Revenue By Geographic Location (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Revenue	$ 2,378	$ 3,810
UNITED STATES
Revenue	913	1,843
Non-US [Member]
Revenue	$ 1,465	$ 1,967

Amount, including 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