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Note 4 - Fair Value Measurements (Tables) | 12 Months Ended
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Jan. 31, 2021
Notes Tables |
Schedule of Derivative Assets at Fair Value [Table Text Block] |
|  |  | Fair Value of Derivatives Designated as Hedge Instruments |  |  |  | Fair Value of Derivatives Not Designated As Hedge Instruments |  |  |  | Fair Value |
Derivative assets: |  |  |  |  |  |  |  |  |  |  |  |
Equity contracts |  |  | - |  |  |  | 8,001 |  |  |  | 8,001 |
|  |  | Fair Value of Derivatives Designated as Hedge Instruments |  |  |  | Fair Value of Derivatives Not Designated As Hedge Instruments |  |  |  | Fair Value |
Derivative assets: |  |  |  |  |  |  |  |  |  |  |  |
Equity contracts |  |  | - |  |  |  | 5,656 |  |  |  | 5,656 |

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