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Note 9 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 31, 2022 | Jan. 31, 2021
Stock-based compensation expense | $ 1,101 | $ 1,044
Share-based Payment Arrangement, Option [Member] |  |
Stock-based compensation expense | 0 | 3
Restricted Stock [Member] |  |
Stock-based compensation expense | $ 1,101 | $ 1,041

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