Income Taxes - Operating Loss Carryforwards (Details) - USD ($) $ in Thousands	Feb. 02, 2020	Feb. 03, 2019
Operating Loss Carryforwards [Line Items]
Total loss carryforwards	$ 190,307	$ 156,360
2030
Operating Loss Carryforwards [Line Items]
Total loss carryforwards	45
2032
Operating Loss Carryforwards [Line Items]
Total loss carryforwards	401
2034
Operating Loss Carryforwards [Line Items]
Total loss carryforwards	163
2035
Operating Loss Carryforwards [Line Items]
Total loss carryforwards	18,258
2036
Operating Loss Carryforwards [Line Items]
Total loss carryforwards	34,752
Thereafter
Operating Loss Carryforwards [Line Items]
Total loss carryforwards	$ 136,688