Note 9 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
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

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

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