Note 4 - Balance Sheet Components (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Depreciation	$ 100	$ 100	$ 223	$ 264
Finite-Lived Intangible Asset, Useful Life (Year)	12 years		12 years