Note 3 - Liquidity and Capital Resources (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Operating Income (Loss)	$ (1,336)	$ (2,713)	$ (2,648)	$ (4,264)
Net Cash Provided by (Used in) Operating Activities			(862)	$ (2,144)
Cash and Cash Equivalents, at Carrying Value	2,000		2,000		$ 4,391
Working Capital	$ 5,470		$ 5,470