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Segment Information - Revenue by Geographic Region (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 28, 2018 | Oct. 29, 2017 | Jul. 30, 2017 | Apr. 30, 2017 | Jan. 29, 2017 | Oct. 30, 2016 | Jul. 31, 2016 | May 01, 2016 | Jan. 28, 2018 | Jan. 29, 2017 | Jan. 31, 2016
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 140,614 | $ 150,304 | $ 153,127 | $ 143,802 | $ 140,031 | $ 137,185 | $ 135,911 | $ 131,145 | $ 587,847 | $ 544,272 | $ 490,219
Asia-Pacific |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 439,342 | 412,167 | 358,480
North America |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 121,144 | 94,123 | 46,152
Europe |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 43,580 | 43,378 | 85,587
Other: Warrant Shares |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales offset |  |  |  |  |  |  |  |  | $ (16,219) | $ (5,396) | $ 0
Net sales revenue |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Net sales revenue | Asia-Pacific |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 75.00% | 76.00% | 74.00%
Net sales revenue | North America |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 21.00% | 17.00% | 9.00%
Net sales revenue | Europe |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 7.00% | 8.00% | 17.00%
Net sales revenue | Other: Warrant Shares |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Allocated share-based compensation expense as a percentage of net revenue |  |  |  |  |  |  |  |  | (3.00%) | (1.00%) | (0.00%)

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