Note 5 - Long-lived Assets - Long-lived Assets, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Equipment [Member]
Property, Plant and Equipment, Gross	$ 1,034	$ 485
Other Equipment and Fixtures [Member]
Property, Plant and Equipment, Gross	328	110
Purchase deposits and Construction in Progress [Member]
Property, Plant and Equipment, Gross	87	650
Equipment and Software [Member]
Property, Plant and Equipment, Gross	1,449	1,245
Accumulated depreciation	(153)	(95)
Property, Plant and Equipment, Net	$ 1,296	$ 1,150