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Note 8 - Earnings (Loss) Per Share - Summary of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2023
Apr. 30, 2023
Jul. 31, 2022
Apr. 30, 2022
Jul. 31, 2023
Jul. 31, 2022
Basic (in shares) 8,029   7,975   8,017 7,947
Dilutive effect of equity compensation plans (in shares) 110   211   0 115
Weighted average common shares outstanding assuming full dilution (in shares) 8,139   8,186   8,017 8,062
Stock options and restricted stock not included in the computation of diluted earnings per share of common stock because the option exercise prices or grant date prices exceeded the average market prices of the common shares (in shares) 79   19   18 115
Stock options and restricted stock with exercise prices or grant date prices below the average market prices (in shares) 110   211   170 115
Net loss $ 1,022 $ (1,123) $ 1,868 $ (885) $ (100) $ 983
Basic (in dollars per share) $ 0.13   $ 0.23   $ (0.01) $ 0.12
Diluted (in dollars per share) $ 0.13   $ 0.23   $ (0.01) $ 0.12