Note 3 - Segment Information - Assets and Capital Expenditures (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets	$ 42,247	$ 41,850
Operating Segments [Member] \| Electronic Instruments [Member]
Assets	835	843
Operating Segments [Member] \| Merchant Investment [Member]
Assets	24,134	23,530
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Assets	$ 17,278	$ 17,477

Amount of asset recognized for present right to economic benefit.

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+ Details