Description of Business and Summary of Significant Accounting Policies (Policies)	9 Months Ended
Oct. 31, 2020
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The condensed consolidated balance sheet as of January 31, 2020 included herein was derived from the audited financial statements as of that date but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. The unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the balance sheets, statements of operations, comprehensive loss, stockholders’ equity and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year or any future period. The unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements in its Annual Report on Form 10-K, for the year ended January 31, 2020. The Company's fiscal year ends on January 31. References to fiscal 2021, for example, refer to the fiscal year ending January 31, 2021.
Use of Estimates	Use of Estimates The preparation of these unaudited condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and reported amounts of revenue and expenses during the periods covered by the consolidated financial statements and accompanying notes. Such estimates include, but are not limited to revenue recognition, stock-based compensation expense, including estimation of the grant date fair value of the common stock, allowance for doubtful accounts, the fair value of the liability and equity components of the convertible senior notes, the assessment of the recoverability of long-lived assets (goodwill and identified intangible assets), lease exit charges and contingencies. The Company bases its estimates on historical experience and on assumptions that it believes are reasonable. The Company assesses these estimates on a regular basis; however, actual results could materially differ from these estimates. The COVID-19 pandemic has created and may continue to create significant uncertainty, which in the future may adversely impact the Company’s results of operations. The Company expects uncertainties around its key accounting estimates, including principally the allowance for doubtful accounts, to continue to evolve depending on the duration and degree of impact associated with the COVID-19 pandemic. The Company’s estimates may change as new events occur and additional information emerges, and such changes are recognized or disclosed in its unaudited condensed consolidated financial statements.
JOBS Act Accounting Election	JOBS Act Accounting Election The Company is an emerging growth company (EGC), as defined in the Jumpstart Our Business Startups Act of 2012 (the JOBS Act). Under the JOBS Act, EGCs can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until such time as those standards apply to private companies. The Company has elected to use this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date the Company (i) is no longer an EGC or (ii) affirmatively and irrevocably opts out of the extended transition period provided in the JOBS Act. As a result, the Company’s unaudited condensed consolidated financial statements may not be comparable to companies that comply with new or revised accounting pronouncements as of public company effective dates. Effective January 31, 2021, the Company will no longer meet the definition of an EGC. Accordingly, as of January 31, 2021, the Company will be required to comply with the effective accounting standards as described in "Recently Issued Accounting Pronouncements," which the Company is currently evaluating.
Concentrations of Credit Risk and Significant Customers	Concentrations of Credit Risk and Significant Customers Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents, marketable securities and trade and other receivables. For cash, cash equivalents and marketable securities, the Company is exposed to credit risk in the event of default to the extent of the amounts recorded on the unaudited condensed consolidated balance sheets. A majority of the cash balances are with U.S. banks and are insured to the extent defined by the Federal Deposit Insurance Corporation. The Company does not require collateral for trade receivables. No customer accounted for 10% or more of total revenues for the three and nine months ended October 31, 2020 and 2019. No customer accounted for 10% or more of trade and other receivables, net as of October 31, 2020 and 2019.
Convertible Senior Notes	Convertible Senior NotesIn September 2020 the Company issued 0.125% convertible senior notes due September 15, 2025 (the Notes), for an aggregate principal amount of $575.0 million to qualified institutional buyers. The Company accounts for these Notes as separate components of liability and equity. The carrying amount of the liability component was included in convertible senior notes, net in the unaudited condensed consolidated balance sheets and was calculated by measuring the fair value of similar liabilities that do not have associated convertible features. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the Notes. This difference represents the debt discount that is amortized to interest expense over the term of the Notes using the effective interest rate method. The gross carrying amount of the equity component was included in additional paid-in capital in the unaudited condensed consolidated balance sheets and is not remeasured as long as it continues to meet the conditions for equity classification.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In February 2016 the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842), as amended, which requires lessees to put all leases on their balance sheets, whether operating or financing, while continuing to recognize the expenses on their income statements in a similar manner to current practice. The guidance states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. In the fourth quarter of fiscal year 2021, the guidance will be required to be adopted by the Company for its fiscal year ending January 31, 2021. While the Company is evaluating the accounting, transition and disclosure requirements of the standard, the Company anticipates the recognition of additional assets and corresponding liabilities related to the leases on its balance sheets. In June 2016 the FASB issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, as amended, which requires the measurement and recognition of expected credit losses for financial assets not held at fair value. ASU No. 2016-13 replaces the existing incurred loss impairment model with a forward-looking expected credit loss model which will result in earlier recognition of credit losses. In the fourth quarter of fiscal year 2021, the guidance will be required to be adopted by the Company for its fiscal year ending January 31, 2021. The Company is in the process of evaluating the impact of this accounting standard. In August 2017 the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, as amended. The ASU is intended to better align an entity's risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. In the fourth quarter of fiscal year 2021, the guidance will be required to be adopted by the Company for its fiscal year ending January 31, 2021. The Company is in the process of evaluating the impact of this accounting standard. In August 2020 the FASB issued ASU No. 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for certain convertible instruments, amends the guidance on derivative scope exceptions for contracts in an entity's own equity, and modifies the guidance on diluted earnings per share calculations as a result of these changes. This new standard is effective for the Company for fiscal year ending January 31, 2023 and interim periods within that fiscal year. The amendment is to be adopted through either a fully retrospective or modified retrospective method of transition. Early adoption is permitted. The Company is in the process of evaluating the impact of this accounting standard.
Revenue Recognition	Revenue Recognition Revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company determines revenue recognition through the following steps: •identification of the contract, or contracts, with a customer; •identification of the performance obligations in the contract; •determination of the transaction price; •allocation of the transaction price to the performance obligations in the contract; and •recognition of revenue when, or as, the Company satisfies a performance obligation. Subscription Revenue Subscription revenue is derived from customers accessing the Company's proprietary hosted cloud application. The Company's customers do not have the ability to take possession of the software operating the cloud application. The contracted subscription terms are typically one year to three years. The Company recognizes subscription revenue ratably over the subscription term, commencing on the date the service is provisioned. Professional Services Revenue Professional services revenue consists of managed services and implementation and other services. These services are distinct from subscription revenue. Managed services support our customers by providing a range of ongoing services including program design, launch, enhancement, expansion and analytics. Managed services are a stand-ready obligation to perform these services over the term of the arrangement and as a result, revenues are recognized ratably over the term of the arrangement. Implementation services consist primarily of initial design, integration and configuration services. Other professional services include projects that enable customers to gain insightful business information through data analysis, and the Company's institute training programs. Implementation and other services revenue are recognized as services are performed. Contracts with Multiple Performance Obligations Most of the Company's contracts with customers contain multiple performance obligations. The Company's subscription services are sold for a broad range of amounts (the selling price is highly variable) and a representative standalone selling price (SSP) is not discernible from past transactions or other observable evidence. Standalone selling prices for professional services are estimated based upon observable transactions when those services are sold on a standalone basis. As a result, the SSP for subscription services included in a contract with multiple performance obligations is determined by applying a residual approach whereby performance obligations related to professional services within a contract are first allocated a portion of the transaction price based upon their respective SSPs, with the residual amount of transaction price allocated to subscription services. Contract Balances and Remaining Performance Obligations Contract assets represent revenue recognized for contracts that have not yet been invoiced to customers, typically for multi-year arrangements. Total contract assets were $4.0 million and $2.1 million as of October 31, 2020 and January 31, 2020, respectively. These balances are included within trade and other receivables, net, on the unaudited condensed consolidated balance sheets. Contract liabilities consist of deferred revenue. Revenue is deferred when the Company has the right to invoice in advance of services being provided. The Company recognized revenue of $94.4 million and $224.1 million during the three and nine months ended October 31, 2020, respectively, and $77.4 million and $167.7 million for the three and nine months ended October 31, 2019, respectively, that were included in the deferred revenue balances at the beginning of the respective periods. The Company applied a practicable expedient allowing it not to disclose the amount of the transaction price allocated to the remaining performance obligations for contracts with an original expected duration of one year or less, which includes certain professional service contracts. Remaining performance obligations represent contracted revenue that has not yet been recognized, and include deferred revenue, and amounts that will be invoiced and recognized as revenue in future periods. As of October 31, 2020 the Company's remaining performance obligations were $731.9 million, approximately 47% of which it expects to recognize as revenue over the next 12 months and the remaining balance will be recognized thereafter. As of January 31, 2020 the Company's remaining performance obligations were $679.0 million, approximately 51% of which it expects to recognize as revenue over the next 12 months and the remaining balance will be recognized thereafter.
Deferred Commissions	Sales commissions earned by the sales force are considered incremental and recoverable costs of obtaining a contract with a customer. Sales commissions for initial contracts are deferred and then amortized on a straight-line basis over a period of benefit that the Company has determined to be five years. The Company determined the period of benefit by taking into consideration its customer contracts, technology and other factors. Sales commissions for renewal contracts (which are not considered commensurate with sales commissions for new revenue contracts) are deferred and amortized on a straight-line basis over the related contractual renewal period. Amortization expense is included in sales and marketing expenses in the unaudited condensed consolidated statements of operations.

Description of Business and Summary of Significant Accounting Policies (Policies)

9 Months Ended

Oct. 31, 2020

The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

The condensed consolidated balance sheet as of January 31, 2020 included herein was derived from the audited financial statements as of that date but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. The unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the balance sheets, statements of operations, comprehensive loss, stockholders’ equity and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year or any future period. The unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements in its Annual Report on Form 10-K, for the year ended January 31, 2020.

The Company's fiscal year ends on January 31. References to fiscal 2021, for example, refer to the fiscal year ending January 31, 2021.

Use of Estimates

The preparation of these unaudited condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and reported amounts of revenue and expenses during the periods covered by the consolidated financial statements and accompanying notes. Such estimates include, but are not limited to revenue recognition, stock-based compensation expense, including estimation of the grant date fair value of the common stock, allowance for doubtful accounts, the fair value of the liability and equity components of the convertible senior notes, the assessment of the recoverability of long-lived assets (goodwill and identified intangible assets), lease exit charges and contingencies. The Company bases its estimates on historical experience and on assumptions that it believes are reasonable. The Company assesses these estimates on a regular basis; however, actual results could materially differ from these estimates.

The COVID-19 pandemic has created and may continue to create significant uncertainty, which in the future may adversely impact the Company’s results of operations. The Company expects uncertainties around its key accounting estimates, including principally the allowance for doubtful accounts, to continue to evolve depending on the duration and degree of impact associated with the COVID-19 pandemic. The Company’s estimates may change as new events occur and additional information emerges, and such changes are recognized or disclosed in its unaudited condensed consolidated financial statements.

JOBS Act Accounting Election

The Company is an emerging growth company (EGC), as defined in the Jumpstart Our Business Startups Act of 2012 (the JOBS Act). Under the JOBS Act, EGCs can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until such time as those standards apply to private companies. The Company has elected to use this extended transition period for complying with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date the Company (i) is no longer an EGC or (ii) affirmatively and irrevocably opts out of the extended transition period provided in the JOBS Act. As a result, the Company’s unaudited condensed consolidated financial statements may not be comparable to companies that comply with new or revised accounting pronouncements as of public company effective dates. Effective January 31, 2021, the Company will no longer meet the definition of an EGC. Accordingly, as of January 31, 2021, the Company will be required to comply with the effective accounting standards as described in "Recently Issued Accounting Pronouncements," which the Company is currently evaluating.

Concentrations of Credit Risk and Significant Customers

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents, marketable securities and trade and other receivables. For cash, cash equivalents and marketable securities, the Company is exposed to credit risk in the event of default to the extent of the amounts recorded on the unaudited condensed consolidated balance sheets. A majority of the cash balances are with U.S. banks and are insured to the extent defined by the Federal Deposit Insurance Corporation.

The Company does not require collateral for trade receivables. No customer accounted for 10% or more of total revenues for the three and nine months ended October 31, 2020 and 2019. No customer accounted for 10% or more of trade and other receivables, net as of October 31, 2020 and 2019.

Convertible Senior Notes

Convertible Senior NotesIn September 2020 the Company issued 0.125% convertible senior notes due September 15, 2025 (the Notes), for an aggregate principal amount of $575.0 million to qualified institutional buyers. The Company accounts for these Notes as separate components of liability and equity. The carrying amount of the liability component was included in convertible senior notes, net in the unaudited condensed consolidated balance sheets and was calculated by measuring the fair value of similar liabilities that do not have associated convertible features. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the Notes. This difference represents the debt discount that is amortized to interest expense over the term of the Notes using the effective interest rate method. The gross carrying amount of the equity component was included in additional paid-in capital in the unaudited condensed consolidated balance sheets and is not remeasured as long as it continues to meet the conditions for equity classification.

Recently Issued Accounting Pronouncements

In February 2016 the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842), as amended, which requires lessees to put all leases on their balance sheets, whether operating or financing, while continuing to recognize the expenses on their income statements in a similar manner to current practice. The guidance states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. In the fourth quarter of fiscal year 2021, the guidance will be required to be adopted by the Company for its fiscal year ending January 31, 2021. While the Company is evaluating the accounting, transition and disclosure requirements of the standard, the Company anticipates the recognition of additional assets and corresponding liabilities related to the leases on its balance sheets.

In June 2016 the FASB issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, as amended, which requires the measurement and recognition of expected credit losses for financial assets not held at fair value. ASU No. 2016-13 replaces the existing incurred loss impairment model with a forward-looking expected credit loss model which will result in earlier recognition of credit losses. In the fourth quarter of fiscal year 2021, the guidance will be required to be adopted by the Company for its fiscal year ending January 31, 2021. The Company is in the process of evaluating the impact of this accounting standard.

In August 2017 the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, as amended. The ASU is intended to better align an entity's risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. In the fourth quarter of fiscal year 2021, the guidance will be required to be adopted by the Company for its fiscal year ending January 31, 2021. The Company is in the process of evaluating the impact of this accounting standard.

In August 2020 the FASB issued ASU No. 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the accounting for certain convertible instruments, amends the guidance on derivative scope exceptions for contracts in an entity's own equity, and modifies the guidance on diluted earnings per share calculations as a result of these changes. This new standard is effective for the Company for fiscal year ending January 31, 2023 and interim periods within that fiscal year. The amendment is to be adopted through either a fully retrospective or modified retrospective method of transition. Early adoption is permitted. The Company is in the process of evaluating the impact of this accounting standard.

Revenue Recognition

Revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services.

The Company determines revenue recognition through the following steps:

•identification of the contract, or contracts, with a customer;

•identification of the performance obligations in the contract;

•determination of the transaction price;

•allocation of the transaction price to the performance obligations in the contract; and

•recognition of revenue when, or as, the Company satisfies a performance obligation.

Subscription Revenue

Subscription revenue is derived from customers accessing the Company's proprietary hosted cloud application. The Company's customers do not have the ability to take possession of the software operating the cloud application. The contracted subscription terms are typically one year to three years.

The Company recognizes subscription revenue ratably over the subscription term, commencing on the date the service is provisioned.

Professional Services Revenue

Professional services revenue consists of managed services and implementation and other services. These services are distinct from subscription revenue.

Managed services support our customers by providing a range of ongoing services including program design, launch, enhancement, expansion and analytics. Managed services are a stand-ready obligation to perform these services over the term of the arrangement and as a result, revenues are recognized ratably over the term of the arrangement.

Implementation services consist primarily of initial design, integration and configuration services. Other professional services include projects that enable customers to gain insightful business information through data analysis, and the Company's institute training programs.

Implementation and other services revenue are recognized as services are performed.

Contracts with Multiple Performance Obligations

Most of the Company's contracts with customers contain multiple performance obligations. The Company's subscription services are sold for a broad range of amounts (the selling price is highly variable) and a representative standalone selling price (SSP) is not discernible from past transactions or other observable evidence. Standalone selling prices for professional services are estimated based upon observable transactions when those services are sold on a standalone basis. As a result, the SSP for subscription services included in a contract with multiple performance obligations is determined by applying a residual approach whereby performance obligations related to professional services within a contract are first allocated a portion of the transaction price based upon their respective SSPs, with the residual amount of transaction price allocated to subscription services.

Contract Balances and Remaining Performance Obligations

Contract assets represent revenue recognized for contracts that have not yet been invoiced to customers, typically for multi-year arrangements. Total contract assets were $4.0 million and $2.1 million as of October 31, 2020 and January 31, 2020, respectively. These balances are included within trade and other receivables, net, on the unaudited condensed consolidated balance sheets.

Contract liabilities consist of deferred revenue. Revenue is deferred when the Company has the right to invoice in advance of services being provided. The Company recognized revenue of $94.4 million and $224.1 million during the three and nine months ended October 31, 2020, respectively, and $77.4 million and $167.7 million for the three and nine months ended October 31, 2019, respectively, that were included in the deferred revenue balances at the beginning of the respective periods.

The Company applied a practicable expedient allowing it not to disclose the amount of the transaction price allocated to the remaining performance obligations for contracts with an original expected duration of one year or less, which includes certain professional service contracts.

Remaining performance obligations represent contracted revenue that has not yet been recognized, and include deferred revenue, and amounts that will be invoiced and recognized as revenue in future periods. As of October 31, 2020 the Company's remaining performance obligations were $731.9 million, approximately 47% of which it expects to recognize as revenue over the next 12 months and the remaining balance will be recognized thereafter. As of January 31, 2020 the Company's remaining performance obligations were $679.0 million, approximately 51% of which it expects to recognize as revenue over the next 12 months and the remaining balance will be recognized thereafter.

Deferred Commissions

Sales commissions earned by the sales force are considered incremental and recoverable costs of obtaining a contract with a customer. Sales commissions for initial contracts are deferred and then amortized on a straight-line basis over a period of benefit that the Company has determined to be five years. The Company determined the period of benefit by taking into consideration its customer contracts, technology and other factors. Sales commissions for renewal contracts (which are not considered commensurate with sales commissions for new revenue contracts) are deferred and amortized on a straight-line basis over the related contractual renewal period. Amortization expense is included in sales and marketing expenses in the unaudited condensed consolidated statements of operations.