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Selected Quarterly Data - Schedule of Selected Quarterly Data (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Feb. 02, 2019 | Oct. 03, 2018 | Jul. 03, 2018 | Apr. 03, 2018 | Feb. 03, 2018 | Oct. 28, 2017 | Jul. 29, 2017 | Apr. 29, 2017 | Feb. 02, 2019 | Feb. 03, 2018 | Jan. 28, 2017 | Jan. 28, 2017
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Sales | $ 131,150 | $ 107,069 | $ 122,206 | $ 113,331 | $ 135,522 | $ 103,700 | $ 121,125 | $ 107,629 | $ 473,756 | $ 467,976 | $ 450,283 | $ 450,283
Gross profit | 57,016 | 47,060 | 56,525 | 50,688 | 61,039 | 44,813 | 55,817 | 48,688 | 211,289 | 210,357 | 204,881 |
Operating loss | (6,441) | (1,230) | (222) | (2,226) | (5,100) | (4,835) | (2,872) | (5,234) | (10,119) | (18,041) | 977 |
Loss before taxes | (7,261) | (2,028) | (1,180) | (3,112) | (5,960) | (5,706) | (3,696) | (6,036) | (13,581) | (21,398) | (2,090) |
Provision (benefit) for income taxes | (31) | (22) | 5 | (2) | (2,636) |  | 35 | 29 | (50) | (2,572) | 166 |
Net loss | $ (7,230) | $ (2,006) | $ (1,185) | $ (3,110) | $ (3,324) | $ (5,706) | $ (3,731) | $ (6,065) | $ (13,531) | $ (18,826) | $ (2,256) |
Loss per share – basic and diluted | $ (0.15) | $ (0.04) | $ (0.02) | $ (0.06) | $ (0.07) | $ (0.12) | $ (0.08) | $ (0.12) | $ (0.28) | $ (0.39) | $ (0.05) |

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