Commitments and Contingencies - Summary of Earn-out Liability (Details) - USD ($) $ in Thousands	Jul. 29, 2018	Jan. 28, 2018
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	$ 26,200	$ 26,520
Amount expected to be settled within twelve months	11,687
Compensation Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	5,432	4,408
Not Conditional Upon Continued Employment [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	20,768	21,668
Interest Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	0	444
Cycleo
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	6,100	5,520
Amount expected to be settled within twelve months	2,187
Cycleo | Compensation Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	5,432	4,408
Cycleo | Not Conditional Upon Continued Employment [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	668	668
Cycleo | Interest Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	0	444
AptoVision Technologies Inc.
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	20,100	21,000
Amount expected to be settled within twelve months	9,500
AptoVision Technologies Inc. | Compensation Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	0	0
AptoVision Technologies Inc. | Not Conditional Upon Continued Employment [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	20,100	21,000
AptoVision Technologies Inc. | Interest Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability booked	$ 0	$ 0