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Note 10 - Net Loss Per Share of Common Stock - Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Net loss from continuing operations $ (1,311) $ (2,750) $ (7,050) $ (10,339)
Net loss from discontinued operations 0 (2,207) 0 (5,308)
Net loss: $ (1,311) $ (4,957) $ (7,050) $ (15,647)
Basic and diluted (in shares) 23,678 23,605 23,605 23,473
Basic and diluted (in dollars per share) $ (0.06) $ (0.12) $ (0.3) $ (0.44)
Basic and diluted net loss per share from discontinued operation (in dollars per share) 0 (0.09) 0 (0.23)
Basic and diluted net loss per share (in dollars per share) $ (0.06) $ (0.21) $ (0.3) $ (0.67)