Note 5 - Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025
Total property and equipment–at cost	$ 6,821		$ 6,739
Total property and equipment–at cost	6,652		6,637
Less: Accumulated depreciation	(6,652)		(6,637)
Property and equipment, net	169	$ 102	102
Equipment [Member]
Total property and equipment–at cost	4,823		4,741
Leasehold Improvements [Member]
Total property and equipment–at cost	1,612		1,612
Software, Internally Developed [Member]
Total property and equipment–at cost	364		364
Furniture and Fixtures [Member]
Total property and equipment–at cost	22		22
Less: Accumulated depreciation	$ (22)		$ (22)

Amount of accumulated depreciation, depletion, and amortization of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection.

Amount, after accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection.

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+ Details