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Commitments and Contingencies - Summary of Earn-out Liability (Details) - USD ($) $ in Thousands | Jan. 26, 2020 | Jan. 27, 2019
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Business Acquisition, Contingent Consideration [Line Items] |  |
Earn-out liability | $ 2,108 | $ 6,675
Earn-out liability expected to be settled within twelve months | 2,108 |
Cycleo |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Earn-out liability | 2,108 | 4,514
Earn-out liability expected to be settled within twelve months | 2,108 |
AptoVision |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Earn-out liability | 0 | 2,161
Earn-out liability expected to be settled within twelve months | 0 |
Compensation Expense [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Earn-out liability | 1,830 | 4,052
Compensation Expense [Member] | Cycleo |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Earn-out liability | 1,830 | 4,052
Compensation Expense [Member] | AptoVision |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Earn-out liability | 0 | 0
Not Conditional Upon Future Employment [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Earn-out liability | 278 | 2,623
Not Conditional Upon Future Employment [Member] | Cycleo |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Earn-out liability | 278 | 462
Not Conditional Upon Future Employment [Member] | AptoVision |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Earn-out liability | $ 0 | $ 2,161

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