Property and Equipment, Net - Additional Information (Details) $ in Thousands	12 Months Ended
	Jan. 31, 2020 USD ($) ft²	Jan. 31, 2019 USD ($)	Jan. 31, 2018 USD ($)	Feb. 01, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Rentable area (in sq ft) | ft²	106,230
Property and equipment, net	$ 58,316	$ 73,664
Operating lease, liability	11,863
Depreciation and amortization, property, plant and equipment	$ 2,700	2,900	$ 2,800
ASC 842
Property, Plant and Equipment [Line Items]
Operating lease, liability		70,200		$ 11,300
Build-to-suit
Property, Plant and Equipment [Line Items]
Property and equipment, net		$ 55,700