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v3.19.1

Segment Information - Revenue by Product Line (Details) - USD ($) | 3 Months Ended
--- | ---
Apr. 28, 2019 | Apr. 29, 2018
Revenue from External Customer [Line Items] |  |
Net sales | $ 131,354,000 | $ 130,429,000
Signal Integrity |  |
Revenue from External Customer [Line Items] |  |
Net sales | 50,257,000 | 65,599,000
Protection |  |
Revenue from External Customer [Line Items] |  |
Net sales | 38,890,000 | 40,792,000
Wireless and Sensing |  |
Revenue from External Customer [Line Items] |  |
Net sales | 42,207,000 | 45,539,000
Other: Warrant Shares |  |
Revenue from External Customer [Line Items] |  |
Net sales offset | $ 0 | $ (21,501,000)
Net sales |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 100.00% | 100.00%
Net sales | Signal Integrity |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 38.00% | 50.00%
Net sales | Protection |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 30.00% | 31.00%
Net sales | Wireless and Sensing |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 32.00% | 35.00%
Net sales | Other: Warrant Shares |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 0.00% | (16.00%)

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