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Debt - Additional Information (Details)				1 Months Ended	12 Months Ended
Debt - Additional Information (Details)	Jul. 26, 2021 USD ($)	Jun. 30, 2021 USD ($) $ / shares shares	Nov. 27, 2017	Jan. 31, 2021 USD ($) $ / shares shares	Jan. 31, 2022 USD ($) TradingDay $ / shares shares	Jan. 31, 2021 USD ($) $ / shares	Jan. 31, 2020 USD ($)
Interest Rate Swap
Debt Instrument [Line Items]
Derivative, Notional Amount					$ 30,000,000.0
Derivative, effective date					Sep. 05, 2019
Derivative, maturity period					5 years
November 2017 Facility
Debt Instrument [Line Items]
Line of credit facility, interest expense					$ 800,000	$ 1,100,000	$ 1,300,000
Convertible Senior Notes \| 0.00% Convertible Senior Notes Due January 15, 2026
Debt Instrument [Line Items]
Aggregate principal amount				$ 345,000,000.0	$ 345,000,000	$ 345,000,000.0
Debt instrument interest rate stated percentage				0.00%		0.00%
Debt instrument due date				Jan. 15, 2026
Principal amount of notes used in conversion rate				$ 1,000		$ 1,000
Initial conversion rate per $1,000 principal amount of notes \| shares				38.7665
Initial conversion price per share of common stock \| $ / shares				$ 25.80		$ 25.80
Debt instrument, convertible, latest date					Oct. 15, 2025
Debt instrument, effective interest rate					0.56%
Interest expense, debt					$ 1,900,000	$ 600,000
Strike price \| $ / shares					25.80
Initial cap prices \| $ / shares					35.58
Common stock shares covered under capped call transactions \| shares					13,400,000
Cost of purchased capped calls					$ 27,800,000
Total debt outstanding with carrying amount				$ 267,614,000	$ 337,463,000	$ 267,614,000
Convertible Senior Notes \| 0.00% Convertible Senior Notes Due January 15, 2026 \| Tender Offer
Debt Instrument [Line Items]
Principal amount of notes used in conversion rate		$ 1,000
Initial conversion rate per $1,000 principal amount of notes \| shares		38.7962
Initial conversion price per share of common stock \| $ / shares		$ 25.78
Convertible Senior Notes \| 0.00% Convertible Senior Notes Due January 15, 2026 \| Debt Instrument, Redemption, Period On or After January 20, 2024
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days \| TradingDay					20
Debt instrument, convertible, threshold consecutive trading days \| TradingDay					30
Debt instrument, convertible, threshold percentage of stock price trigger					130.00%
Debt instrument, redemption period, start date					Jan. 20, 2024
Debt instrument, redemption price, percentage of principal amount redeemed					100.00%
Convertible Senior Notes \| 0.00% Convertible Senior Notes Due January 15, 2026 \| Debt Instrument, Convertible, Terms of Conversion Feature, Circumstances One
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days \| TradingDay					20
Debt instrument, convertible, threshold consecutive trading days \| TradingDay					30
Debt instrument, convertible, threshold percentage of stock price trigger					130.00%
Convertible Senior Notes \| 0.00% Convertible Senior Notes Due January 15, 2026 \| Debt Instrument, Convertible, Terms of Conversion Feature, Circumstances Two
Debt Instrument [Line Items]
Debt instrument, convertible, threshold consecutive trading days \| TradingDay					5
Debt instrument, convertible, threshold maximum percentage of product of last reported sale price of common stock					98.00%
Secured Debt \| November 2017 Facility \| Wells Fargo Bank
Debt Instrument [Line Items]
Debt instrument due date	Jul. 26, 2024
Secured Debt \| November 2017 Facility \| Revolving Credit Facility \| Wells Fargo Bank
Debt Instrument [Line Items]
Line of credit facility, termination date			Nov. 27, 2017
Line of credit facility, maximum borrowing capacity	$ 65,000,000.0
Total debt outstanding with carrying amount					$ 30,000,000.0
Secured Debt \| November 2017 Facility \| Revolving Credit Facility \| Wells Fargo Bank \| London Interbank Offered Rate (LIBOR) \| Maximum
Debt Instrument [Line Items]
Line of credit facility, floating interest rate					1.65%
Secured Debt \| November 2017 Facility \| Revolving Credit Facility \| Wells Fargo Bank \| London Interbank Offered Rate (LIBOR) \| Minimum
Debt Instrument [Line Items]
Line of credit facility, floating interest rate					1.15%
Secured Debt \| November 2017 Facility \| Letters of Credit \| Wells Fargo Bank
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity sublimit	$ 45,000,000.0