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Note 9 - Retirement Plans - Asset Allocation (Details) - USD ($) $ in Thousands | Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
--- | --- | --- | ---
Plan assets |  | $ 6,550 | $ 6,179 | $ 6,700
Fair Value, Inputs, Level 1 [Member] |  |  |  |
Plan assets |  | 5,642 | 5,424 |
Fair Value, Inputs, Level 2 [Member] |  |  |  |
Plan assets |  | 169 | 121 |
Fair Value Measured at Net Asset Value Per Share [Member] |  |  |  |
Plan assets | [1] | 739 | 634 |
Defined Benefit Plan, Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Plan assets |  | 3,139 | 2,991 |
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Plan assets |  | 2,134 | 2,065 |
Defined Benefit Plan, Real Estate [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Plan assets |  | 369 | 368 |
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Plan assets |  | $ 169 | $ 121 |
[1] | Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the reconciliation of benefit obligations, plan assets and funded status of plan.

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