Commitments and Contingencies - Summary of Earn-out Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2018	Jan. 29, 2017
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	$ 26,520	$ 6,068
Earn-out liability expected to be settled within twelve months	10,908
Amount settled	1,580
Cycleo [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	5,520	6,068
Earn-out liability expected to be settled within twelve months	2,008
Amount settled	1,580
AptoVision
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	21,000	0
Earn-out liability expected to be settled within twelve months	8,900
Amount settled	0
Compensation Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	4,408	4,576
Compensation Expense [Member] | Cycleo [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	4,408	4,576
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	21,668	949
Not Conditional Upon Future Employment [Member] | Cycleo [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	668	949
Not Conditional Upon Future Employment [Member] | AptoVision
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	21,000	0
Interest Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	444	543
Interest Expense [Member] | Cycleo [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	444	543
Interest Expense [Member] | AptoVision
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	$ 0	$ 0