Note 9 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 31, 2021	Jan. 31, 2020
Stock-based compensation expense	$ 1,044	$ 1,011
Share-based Payment Arrangement, Option [Member]
Stock-based compensation expense	3	12
Restricted Stock [Member]
Stock-based compensation expense	$ 1,041	$ 999

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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