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Fair Value Measurements - Additional Information (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Jan. 31, 2021 | Nov. 27, 2017
November 2017 Facility | Secured Debt |  |
Derivative [Line Items] |  |
Debt instrument, principal amount |  | $ 350,000,000.0
November 2017 Facility | Revolving Credit Facility | Secured Debt | Wells Fargo Bank |  |
Derivative [Line Items] |  |
Total debt outstanding with carrying amount | $ 30,000,000.0 |
0.00% Convertible Notes Due 2026 | Senior Notes |  |
Derivative [Line Items] |  |
Total debt outstanding with carrying amount | $ 267,600,000 |
Debt instrument interest rate stated percentage | 0.00% |
Debt instrument maturity year | 2026 |
Debt instrument, principal amount | $ 345,000,000.0 |
Debt instrument, if-converted value of note less than principal amount | $ 113,100,000 |
0.00% Convertible Notes Due 2026 | Senior Notes | Over the Counter Market |  |
Derivative [Line Items] |  |
Quoted bid price of notes | $ 101.00 |
0.00% Convertible Notes Due 2026 | Senior Notes | Level 2 |  |
Derivative [Line Items] |  |
Convertible senior notes, fair value | $ 348,400,000 |
0.00% Convertible Notes Due 2026 | Senior Notes | Class A Common Stock |  |
Derivative [Line Items] |  |
Closing price of common stock | $ 17.34 |
Interest Rate Swap |  |
Derivative [Line Items] |  |
Derivative, effective date | Sep. 05, 2019 |
Derivative, maturity period | 5 years |
Derivative, notional value | $ 30,000,000.0 |
Net unrealized loss of interest rate swap | $ 1,200,000 |

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