Investments - Long-Term Investments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 02, 2020	Feb. 01, 2020
Investment Holdings [Line Items]
Long-term investments	$ 2,271	$ 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	873	5,613
Level 2 | Fair Value, Measurements, Recurring | U.S. asset-backed securities
Investment Holdings [Line Items]
Long-term investments	736	5,498
Level 2 | Fair Value, Measurements, Recurring | Non-U.S. corporate debt securities
Investment Holdings [Line Items]
Long-term investments	662	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