Fair Value Measurements (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Aug. 03, 2019 |
Aug. 04, 2018 |
Aug. 03, 2019 |
Aug. 04, 2018 |
Feb. 02, 2019 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| Impairment charge | $ 2,300 | $ 0 | $ 2,281 | $ 0 | |
| Recurring [Member] | Level 1 [Member] | Money market funds [Member] | |||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| Money market funds | 130,389 | 130,389 | $ 155,014 | ||
| Recurring [Member] | Level 2 [Member] | Money market funds [Member] | |||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| Money market funds | 0 | 0 | 0 | ||
| Recurring [Member] | Level 3 [Member] | Money market funds [Member] | |||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| Money market funds | $ 0 | $ 0 | $ 0 | ||