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Income Taxes (Reconciliation of Income Tax Expense to Amount Computed at Federal Statutory Rate) (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2018 | Feb. 02, 2020 | Feb. 03, 2019 | Jan. 28, 2018 | Dec. 31, 2017
Income Taxes [Abstract] |  |  |  |  |
Federal taxes at statutory rate |  | $ 5,114 | $ 6,637 | $ 11,939 |
Statutory rate change |  |  |  | (1,510) |
State and local income taxes, net of federal benefit |  | 965 | 1,679 | 1,410 |
Research and development tax credits |  | (487) |  |  |
Other |  | (163) | 134 | 39 |
Total income tax expense |  | $ 5,429 | $ 8,450 | $ 11,878 |
Federal taxes at statutory rate | 21.00% | 21.00% | 21.00% | 33.90% | 35.00%
Statutory rate change |  |  |  | (4.30%) |
State and local income taxes, net of federal benefit |  | 4.00% | 5.30% | 4.00% |
Research and development tax credits |  | (2.00%) |  |  |
Other |  | (0.70%) | 0.40% | 0.10% |
Total income tax expense |  | 22.30% | 26.70% | 33.70% |

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