Commitments and Contingencies - Summary of Earn-out Liability (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 25, 2015
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	$ 6,259	$ 1,771
Earn-out liability expected to be settled within twelve months	0	0
Cycleo [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	6,259	1,771
Earn-out liability expected to be settled within twelve months	2,155	0
Triune Systems
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	0	0
Earn-out liability expected to be settled within twelve months	0	0
Compensation Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	4,397	140
Compensation Expense [Member] | Cycleo [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	4,397	140
Compensation Expense [Member] | Triune Systems
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	1,457	1,619
Not Conditional Upon Future Employment [Member] | Cycleo [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	1,457	1,619
Not Conditional Upon Future Employment [Member] | Triune Systems
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	0	0
Interest Expense [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	405	12
Interest Expense [Member] | Cycleo [Member]
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	405	12
Interest Expense [Member] | Triune Systems
Business Acquisition, Contingent Consideration [Line Items]
Earn-out liability	$ 0	$ 0