Note 11 - Business Segment and Geographic Financial Data - Geographic Segment Financial Data (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Revenues	$ 6,382	$ 4,957
Assets	46,709		$ 48,797
UNITED STATES
Revenues	5,359	3,595
Assets	42,788		44,430
Non-US [Member]
Revenues	1,023	$ 1,362
Assets	$ 3,921		$ 4,367

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

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