Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Operating Loss Carryforwards [Line Items]
Undistributed earnings of foreign subsidiaries	$ 40,900,000
Deferred tax assets, increase (decrease) in valuation allowance	78,300,000	$ 85,500,000
Gross unrecognized tax benefit	28,570,000	$ 18,891,000	$ 12,401,000	$ 6,375,000
Unrecognized tax benefits that would impact effective tax rate	900,000
Current or cumulative interest and penalties related to uncertain tax positions	0
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	960,200,000
Research and development tax credit carryforwards	55,200,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	509,800,000
Research and development tax credit carryforwards	$ 48,300,000