Commitments and Contingencies - Future Minimum Payments Under Technology License Obligations (Details) - USD ($) $ in Thousands	Jan. 28, 2017	Jan. 30, 2016
Fiscal Year
Less: current portion	$ (21,905)	$ (17,985)
Non-current portion	14,949	$ 12,461
Technology License Obligations
Fiscal Year
2018	23,180
2019	7,025
2020 and thereafter	7,025
Total future minimum lease payments	37,230
Less: amount representing interest	(170)
Present value of future minimum payments	37,060
Less: current portion	(22,111)
Non-current portion	$ 14,949