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Equity Award Plans - Summarizes Information about Stock Options Outstanding (Details)
shares in Thousands
3 Months Ended
May 04, 2019
$ / shares
shares
2.33 to 5.00  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, lower range $ 2.33
Range of Exercise Prices, upper range $ 5.00
Stock Options Outstanding, Number Outstanding | shares 237
Stock Options Outstanding, Weighted Average Remaining Life 9 years 2 months 12 days
Stock Options Outstanding, Weighted Average Exercise Price $ 2.63
Stock Options Exercisable, Number Exercisable | shares 43
Stock Options Exercisable, Weighted Average Exercise Price $ 2.65
5.01 to 10.00  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, lower range 5.01
Range of Exercise Prices, upper range $ 10.00
Stock Options Outstanding, Number Outstanding | shares 134
Stock Options Outstanding, Weighted Average Remaining Life 8 years 3 months 18 days
Stock Options Outstanding, Weighted Average Exercise Price $ 6.32
Stock Options Exercisable, Number Exercisable | shares 48
Stock Options Exercisable, Weighted Average Exercise Price $ 7.49
10.01 to 31.38  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, lower range 10.01
Range of Exercise Prices, upper range $ 31.38
Stock Options Outstanding, Number Outstanding | shares 72
Stock Options Outstanding, Weighted Average Remaining Life 5 years 2 months 12 days
Stock Options Outstanding, Weighted Average Exercise Price $ 15.53
Stock Options Exercisable, Number Exercisable | shares 70
Stock Options Exercisable, Weighted Average Exercise Price $ 15.69
2.33 to 31.38  
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]  
Range of Exercise Prices, lower range 2.33
Range of Exercise Prices, upper range $ 31.38
Stock Options Outstanding, Number Outstanding | shares 443
Stock Options Outstanding, Weighted Average Remaining Life 8 years 3 months 18 days
Stock Options Outstanding, Weighted Average Exercise Price $ 5.85
Stock Options Exercisable, Number Exercisable | shares 161
Stock Options Exercisable, Weighted Average Exercise Price $ 9.75