Note 3 - Equipment and Improvements - Schedule of Equipment and Improvements (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Less accumulated depreciation and amortization	$ (7,363)	$ (8,336)
Equipment and improvements, net	331	538
Equipment and Improvements [Member]
Property, plant and equipment, gross	5,448	6,624
Leasehold Improvements [Member]
Property, plant and equipment, gross	1,436	1,440
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 810	$ 810

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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