Note 5 - Property and Equipment, Net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Property, plant, and equipment, gross	$ 807	$ 793
Less: accumulated depreciation	(641)	(554)
Property and equipment, net	166	239
Office Equipment [Member]
Property, plant, and equipment, gross	323	317
Laboratory Equipment [Member]
Property, plant, and equipment, gross	115	111
Automobiles [Member]
Property, plant, and equipment, gross	98	94
Leasehold Improvements [Member]
Property, plant, and equipment, gross	$ 271	$ 271