Note 2 - Summary of Significant Accounting Policies - Basic and Diluted Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net loss from continuing operations	$ (2,708)			$ (2,350)			$ (6,630)	$ (7,151)
Net income (loss) from discontinued operations, net of income taxes	28			(3,014)			279	(5,015)
Net loss	$ (2,680)	$ (1,573)	$ (2,096)	$ (5,364)	$ (3,991)	$ (2,810)	$ (6,351)	$ (12,166)
Denominator:
Weighted-average number of common shares - Basic (in shares)	259,092,833			259,092,833			259,092,833	259,092,833
Weighted-average number of common shares - Diluted (in shares)	259,092,833			259,092,833			259,092,833	259,092,833
Net loss per common share:
Basic EPS (in dollars per share)	$ (0.01)			$ (0.02)			$ (0.02)	$ (0.05)
Diluted EPS (in dollars per share)	$ (0.01)			$ (0.02)			$ (0.02)	$ (0.05)