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Equity Award Plans - Summarizes Information about Stock Options Outstanding (Details)
shares in Thousands
6 Months Ended
Aug. 03, 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 180
Stock Options Outstanding, Weighted Average Remaining Life 9 years
Stock Options Outstanding, Weighted Average Exercise Price $ 2.64
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 121
Stock Options Outstanding, Weighted Average Remaining Life 8 years 2 months 12 days
Stock Options Outstanding, Weighted Average Exercise Price $ 6.19
Stock Options Exercisable, Number Exercisable | shares 42
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 66
Stock Options Outstanding, Weighted Average Remaining Life 4 years 10 months 24 days
Stock Options Outstanding, Weighted Average Exercise Price $ 15.61
Stock Options Exercisable, Number Exercisable | shares 66
Stock Options Exercisable, Weighted Average Exercise Price $ 15.61
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 367
Stock Options Outstanding, Weighted Average Remaining Life 8 years
Stock Options Outstanding, Weighted Average Exercise Price $ 6.15
Stock Options Exercisable, Number Exercisable | shares 151
Stock Options Exercisable, Weighted Average Exercise Price $ 9.68