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v3.20.1

Segment Information - Revenue by Geographic Region (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 26, 2020 | Oct. 27, 2019 | Jul. 28, 2019 | Apr. 28, 2019 | Jan. 27, 2019 | Oct. 28, 2018 | Jul. 29, 2018 | Apr. 29, 2018 | Jan. 26, 2020 | Jan. 27, 2019 | Jan. 28, 2018
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 138,001 | $ 141,011 | $ 137,146 | $ 131,354 | $ 160,006 | $ 173,550 | $ 163,211 | $ 130,429 | $ 547,512 | $ 627,196 | $ 587,847
Asia-Pacific |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 421,584 | 480,680 | 439,342
North America |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 76,652 | 118,664 | 121,144
Europe |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 49,276 | 49,353 | 43,580
Other: Warrant Shares |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales offset |  |  |  |  |  |  |  |  | $ 0 | $ (21,501) | $ (16,219)
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 |  |  |  |  |  |  |  |  | 77.00% | 76.00% | 75.00%
Net sales revenue | North America |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 14.00% | 19.00% | 21.00%
Net sales revenue | Europe |  |  |  |  |  |  |  |  |  |  |
Geographic Information And Concentration Of Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 9.00% | 8.00% | 7.00%
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 |  |  |  |  |  |  |  |  | 0.00% | (3.00%) | (3.00%)

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