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v3.19.1

Segment Information - Revenue by Product Line (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 27, 2019 | Oct. 28, 2018 | Jul. 29, 2018 | Apr. 29, 2018 | Jan. 28, 2018 | Oct. 29, 2017 | Jul. 30, 2017 | Apr. 30, 2017 | Jan. 27, 2019 | Jan. 28, 2018 | Jan. 29, 2017
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 160,006 | $ 173,550 | $ 163,211 | $ 130,429 | $ 140,614 | $ 150,304 | $ 153,127 | $ 143,802 | $ 627,196 | $ 587,847 | $ 544,272
Signal Integrity [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 276,040 | 263,015 | 258,824
Protection |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 182,068 | 176,482 | 149,865
Wireless and Sensing [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 190,589 | 164,569 | 140,774
Systems Innovation [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 | 205
Other: Warrant Shares |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales offset |  |  |  |  |  |  |  |  | $ (21,501) | $ (16,219) | $ (5,396)
Net sales revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Net sales revenue | Signal Integrity [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 44.00% | 45.00% | 47.00%
Net sales revenue | Protection |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 29.00% | 30.00% | 28.00%
Net sales revenue | Wireless and Sensing [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 30.00% | 28.00% | 26.00%
Net sales revenue | Systems Innovation [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  | 0.00% | 0.00% | 0.00%
Net sales revenue | Other: Warrant Shares |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Allocated share-based compensation expense as a percentage of net revenue |  |  |  |  |  |  |  |  | (3.00%) | (3.00%) | (1.00%)

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