Note 13 - Earnings and Dividends Per Share - Reconciliation Between Basic and Diluted Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net income (loss)	$ (4,676)	$ (5,000)	$ (4,154)	$ (4,726)
Basic and diluted earnings (loss) per share (in dollars per share)	$ (0.31)	$ (0.34)	$ (0.28)	$ (0.32)
Basic and diluted shares used in computing earnings per share (in shares)	14,921,968	14,921,968	14,921,968	14,921,968