Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | May 02, 2020 | Feb. 01, 2020 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | $ 499 | $ 8,977 |
Long-term investments | 2,271 | 14,912 |
Level 1 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 62 | 27 |
Level 2 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 2,198 |
Level 3 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cash equivalents | 0 | 0 |
U.S. corporate debt securities | Level 1 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Long-term investments | 0 | 0 |
U.S. corporate debt securities | Level 2 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 249 | 3,435 |
Long-term investments | 873 | 5,613 |
U.S. corporate debt securities | Level 3 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Long-term investments | 0 | 0 |
Commercial paper | Level 1 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Commercial paper | Level 2 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 2,489 |
Commercial paper | Level 3 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Municipal securities | Level 1 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Municipal securities | Level 2 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 1,594 |
Municipal securities | Level 3 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Non-U.S. corporate debt securities | Level 1 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Long-term investments | 0 | 0 |
Non-U.S. corporate debt securities | Level 2 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 250 | 1,136 |
Long-term investments | 662 | 2,409 |
Non-U.S. corporate debt securities | Level 3 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Long-term investments | 0 | 0 |
U.S. asset-backed securities | Level 1 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Long-term investments | 0 | 0 |
U.S. asset-backed securities | Level 2 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 323 |
Long-term investments | 736 | 5,498 |
U.S. asset-backed securities | Level 3 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Short-term investments | 0 | 0 |
Long-term investments | 0 | 0 |
Other foreign securities | Level 1 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Long-term investments | 0 | 0 |
Other foreign securities | Level 2 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Long-term investments | 0 | 810 |
Other foreign securities | Level 3 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Long-term investments | 0 | 0 |
Non-U.S. asset-backed securities | Level 1 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Long-term investments | 0 | 0 |
Non-U.S. asset-backed securities | Level 2 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Long-term investments | 0 | 582 |
Non-U.S. asset-backed securities | Level 3 | Fair Value, Measurements, Recurring | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Long-term investments | $ 0 | $ 0 |