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Common Stock Repurchase Program (Detail) - Common Stock - USD ($) | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jan. 29, 2017 | Jan. 31, 2016 | May 01, 2016 | Jun. 15, 2016
Stockholders Equity Note [Line Items] |  |  |  |
Common stock repurchased |  |  | 100,776 |
Common Stock Repurchase Program June 15, 2016 [Member] |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |
Authorization amount for repurchase of common stock |  |  |  | $ 5,000,000
Common stock repurchased | 0 | 0 |  |
Remaining authorized repurchase amount | $ 5,000,000 |  |  |

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