v3.8.0.1
Goodwill and Acquired Intangible Assets, Net - Acquired Intangible Assets Net (Details) - Purchased and core technology - USD ($)
$ in Thousands
12 Months Ended
Feb. 03, 2018
Jan. 28, 2017
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amounts $ 25,798 $ 25,798
Accumulated Amortization and Write-Offs (25,798) (22,227)
Net Carrying Amounts $ 0 $ 3,571
Minimum    
Acquired Finite-Lived Intangible Assets [Line Items]    
Range of Useful Lives 4 years  
Maximum    
Acquired Finite-Lived Intangible Assets [Line Items]    
Range of Useful Lives 8 years