Note 6 - Property and Equipment, Net (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Depreciation	$ 0	$ 1	$ 2	$ 3
Impaired Assets to be Disposed of by Method Other than Sale, Carrying Value of Asset	$ 117		$ 117