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Note 6 - Stock-based Compensation (Details Textual) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Oct. 30, 2021 | Oct. 30, 2021 | Oct. 31, 2020 | Oct. 30, 2021 | Oct. 31, 2020 | Apr. 14, 2020
Options and Restricted Stock [Member] |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  | $ 0.6 | $ 0.5 | $ 2.1 | $ 1.3 |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $ 3.0 | $ 3.0 |  | 3.0 |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) | 1 year 4 months 24 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 |  |  |  | $ 2.2 | $ 2.3 |
Incentive Plan 2020 [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) |  |  |  |  |  | 1,000,000

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