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Note 6 - Stock-based Compensation (Details Textual) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2020 | Oct. 31, 2020 | Nov. 02, 2019 | Oct. 31, 2020 | Nov. 02, 2019 | Feb. 01, 2020
Common Stock, Shares Authorized (in shares) | 50,000,000 | 50,000,000 | 50,000,000 | 50,000,000 | 50,000,000 | 50,000,000
Options and Restricted Stock [Member] |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  | $ 0.5 | $ 0.4 | $ 1.3 | $ 1.8 |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $ 2.8 | $ 2.8 |  | $ 2.8 |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  | 1 year 3 months 18 days |  |
Time-based and Performance-based Shares [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value |  |  |  | $ 2.3 | $ 2.1 |
Performance Shares [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) | 3 years |  |  |  |  |
Incentive Plan 2020 [Member] |  |  |  |  |  |
Common Stock, Shares Authorized (in shares) | 1,000,000 | 1,000,000 |  | 1,000,000 |  |

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