Note 9 - Segment Reporting - Revenue By Geographic Location (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Revenue	$ 2,437	$ 2,378
UNITED STATES
Revenue	1,142	913
Non-US [Member]
Revenue	$ 1,295	$ 1,465

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