Note 4 - Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property and equipment, gross	$ 19,064	$ 18,562
Less: accumulated depreciation	(9,588)	(6,831)
Property and equipment, net	9,476	11,731
Laboratory Equipment [Member]
Property and equipment, gross	13,714	13,448
Office Equipment [Member]
Property and equipment, gross	1,120	1,105
Leasehold Improvements [Member]
Property and equipment, gross	4,089	3,985
Construction in Progress [Member]
Property and equipment, gross	$ 141	$ 24