Note 3 - Liquidity and Capital Resource and Going Concern Evaluation (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating Income (Loss), Total	$ (11,119)	$ (13,590)
Net Cash Provided by (Used in) Operating Activities, Total	(3,189)	(8,838)
Cash and Cash Equivalents, at Carrying Value, Total	4,391	$ 7,173
Working Capital	$ 6,610