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Note 10 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019
Stock-based compensation expense | $ 1,011 | $ 1,165
Share-based Payment Arrangement, Option [Member] |  |
Stock-based compensation expense | 12 | 33
Restricted Stock [Member] |  |
Stock-based compensation expense | $ 999 | $ 1,132

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- Definition Amount, after tax, of expense for award under share-based payment arrangement. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |