Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

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Carrying amount of long-term convertible debt as of the balance sheet date, net of the amount due in the next twelve months or greater than the normal operating cycle, if longer. The debt is convertible into another form of financial instrument, typically the entity's common stock.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Summary of Significant Accounting Policies - Adjusted Financial Statements to Apply Adopted Guidance (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Feb. 01, 2021	Jan. 31, 2021
Liabilities
Principal		$ 287,500
Unamortized debt discount and issuance costs		(8,236)
Net carrying amount	$ 279,703	279,264	$ 217,528
Equity Component:
Additional paid-in capital	(557,843)	(546,016)	(614,494)
Accumulated deficit	$ (263,926)	$ (241,368)	(248,110)
Accounting Standards Update 2020-06
Liabilities
Net carrying amount			61,700
Equity Component:
Additional paid-in capital			(68,500)
Accumulated deficit			6,700
Previously Reported
Liabilities
Principal			287,500
Unamortized debt discount and issuance costs			(69,972)
Net carrying amount			217,528
Equity Component:
Additional paid-in capital			(614,494)
Accumulated deficit			(248,110)
ASU 2020-06 Adoption Adjustment \| Accounting Standards Update 2020-06
Liabilities
Principal			0
Unamortized debt discount and issuance costs			61,736
Net carrying amount			61,736
Equity Component:
Additional paid-in capital			68,478
Accumulated deficit			$ 6,742