Note 11 - Business Segment and Geographic Financial Data - Geographic Segment Financial Data (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Revenues	$ 6,080	$ 6,382
Assets	44,487		$ 47,179
UNITED STATES
Revenues	5,247	5,359
Assets	41,751		44,345
Non-US [Member]
Revenues	833	$ 1,023
Assets	$ 2,736		$ 2,834

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