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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 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Net loss from continuing operations $ (291) $ (4,890) $ (5,739) $ (7,589)
Net loss from discontinued operations 0 (928) 0 (3,101)
Net loss: $ (291) $ (5,818) $ (5,739) $ (10,690)
Basic and diluted (in shares) 23,628 23,476 23,568 23,405
Basic and diluted (in dollars per share) $ (0.01) $ (0.21) $ (0.24) $ (0.32)
Basic and diluted net loss per share from discontinued operation (in dollars per share) 0 (0.04) 0 (0.13)
Basic and diluted net loss per share (in dollars per share) $ (0.01) $ (0.25) $ (0.24) $ (0.45)