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Note 10 - Net Income (Loss) Per Share of Common Stock - Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Net loss $ (5,448) $ (2,699)
Net loss from discontinued operation 0 (2,173)
Net loss: $ (5,448) $ (4,872)
Basic and diluted (in shares) 23,508 23,334
Basic and diluted (in dollars per share) $ (0.23) $ (0.12)
Basic and diluted net loss per share from discontinued operation (in dollars per share) 0 (0.09)
Basic and diluted net loss per share (in dollars per share) $ (0.23) $ (0.21)