Note 3 - Segment Information - Assets and Capital Expenditures (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Total assets	$ 91,972	$ 46,776
Corporate Segment [Member]
Total assets	61,005	19,771
Operating Segments [Member]
Total assets	91,972	46,776
Operating Segments [Member] | Electronic Instruments [Member]
Total assets	1,976	1,237
Operating Segments [Member] | Merchant Investment [Member]
Total assets	28,991	25,768
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Total assets	$ 0	$ 0