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Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands | May 04, 2019 | Feb. 02, 2019 | Feb. 03, 2018
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Retained earnings |  | $ (6,441) | $ (32,825)
ASU 2016-02 | Restatement |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Retained earnings |  | $ 9,300 |
Remaining amortization period of deferred gain |  | 7 years |
Forecast | ASU 2016-02 | Minimum |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Right-of-use assets | $ 175 |  |
Lease liabilities | 205 |  |
Forecast | ASU 2016-02 | Maximum |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Right-of-use assets | 195 |  |
Lease liabilities | $ 225 |  |

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