Note 3 - Segment Information - Assets and Capital Expenditures (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Total assets	$ 49,684	$ 46,776
Corporate Segment [Member]
Total assets	20,019	19,771
Operating Segments [Member]
Total assets	49,684	46,776
Operating Segments [Member] \| Electronic Instruments [Member]
Total assets	1,469	1,237
Operating Segments [Member] \| Merchant Investment [Member]
Total assets	28,196	25,768
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Total assets	$ 0	$ 0

Amount of asset recognized for present right to economic benefit.

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+ Details