Investments - Long-Term Investments (Details) - USD ($) $ in Thousands	6 Months Ended
	Aug. 01, 2020	Aug. 03, 2019	Feb. 01, 2020
Investment Holdings [Line Items]
Long-term investments	$ 729		$ 14,912
Unrealized (loss) gain on available-for-sale investments	0	$ 0
Level 2 | Fair Value, Measurements, Recurring | U.S. corporate debt securities
Investment Holdings [Line Items]
Long-term investments	401		5,613
Level 2 | Fair Value, Measurements, Recurring | U.S. asset-backed securities
Investment Holdings [Line Items]
Long-term investments	0		5,498
Level 2 | Fair Value, Measurements, Recurring | Non-U.S. corporate debt securities
Investment Holdings [Line Items]
Long-term investments	328		2,409
Level 2 | Fair Value, Measurements, Recurring | Other foreign securities
Investment Holdings [Line Items]
Long-term investments	0		810
Level 2 | Fair Value, Measurements, Recurring | Non-U.S. asset-backed securities
Investment Holdings [Line Items]
Long-term investments	$ 0		$ 582