Commitments and Contingencies - Summary of Earn-out Liability (Details) - USD ($) $ in Thousands	Apr. 28, 2019	Jan. 27, 2019
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	$ 4,766	$ 6,675
Amount expected to be settled within twelve months	2,610
Compensation expense
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	4,304	4,052
Not conditional upon continued employment
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	462	2,623
Cycleo
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	4,766	4,514
Amount expected to be settled within twelve months	2,610
Cycleo | Compensation expense
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	4,304	4,052
Cycleo | Not conditional upon continued employment
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	462	462
AptoVision
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	0	2,161
Amount expected to be settled within twelve months	0
AptoVision | Compensation expense
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	0	0
AptoVision | Not conditional upon continued employment
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	$ 0	$ 2,161