Note 4 - Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Property and equipment, gross	$ 19,050	$ 19,213
Less: accumulated depreciation	(12,986)	(10,508)
Property and equipment, net	6,064	8,705
Laboratory Equipment [Member]
Property and equipment, gross	13,897	13,806
Office Equipment [Member]
Property and equipment, gross	1,142	1,140
Leasehold Improvements [Member]
Property and equipment, gross	4,000	4,107
Construction in Progress [Member]
Property and equipment, gross	$ 11	$ 160