Description of Business and Significant Accounting Policies	12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Significant Accounting Policies	Description of Business and Significant Accounting Policies Description of Business ON24, Inc. and its subsidiaries (together, ON24 or the Company) provides a leading, cloud-based platform for digital engagement that enables businesses to convert customer engagement into revenue through interactive webinar experiences, virtual event experiences and multimedia content experiences. The Company’s platform offers a portfolio of interactive, personalized and content-rich digital experience products that creates and captures actionable, real-time data at scale from millions of professionals every month to provide businesses with buying signals and behavioral insights to efficiently convert prospects into customers. The Company was incorporated in the state of Delaware in January 1998 as NewsDirect, Inc. and in December 1998 changed its name to ON24, Inc. The Company is headquartered in San Francisco, California. Initial Public Offering On February 5, 2021, the Company closed its initial public offering (IPO) of 7,599,928 shares of its common stock at a public offering price of $50 per share for net proceeds of approximately $347.8 million, after deducting the underwriting discount of approximately $26.6 million and other offering costs of approximately $5.6 million. The shares of common stock sold in the IPO and the net proceeds from the IPO included the full exercise of the underwriters’ option to purchase additional shares. Upon the closing of the IPO, all of the Company's outstanding shares of Class A-1 and Class A-2 convertible preferred stock and Class B and Class B-1 redeemable convertible preferred stock were automatically converted into an aggregate of 27,227,466 shares of common stock on a one-for-one basis. Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements include the accounts of ON24 Inc. and its subsidiaries and have been prepared in accordance with generally accepted accounting principles in the United States of America (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) for annual financial reporting. All intercompany transactions and balances have been eliminated in consolidation. Certain prior period amounts have been reclassified on the consolidated statements of cash flows and in Note 5 to conform to the current year's presentation. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Significant items subject to such estimates and assumptions include, but are not limited to, the estimated expected benefit period for deferred contract acquisition costs, the determination of standalone selling price for the Company’s performance obligations, the allowance for doubtful accounts and billing reserve, the useful lives of long-lived assets, the estimated value of common stock prior to the IPO and other assumptions used to measure stock-based compensation, the valuation of deferred income tax assets and uncertain tax positions. Actual results could differ from those estimates. Concentration of Risks The Company’s financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, marketable securities and accounts receivable. The Company maintains its cash and cash equivalents, restricted cash and marketable securities with high-quality financial institutions with investment-grade ratings. A majority of the cash balances are with banks in the U.S. and are insured to the extent defined by the Federal Deposit Insurance Corporation. For concentration of risks on accounts receivables and revenue, refer to Note 1. Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents consist of bank deposits and highly liquid investments, primarily money market mutual funds purchased with an original maturity of three months or less. Restricted cash included in other long-term assets in the consolidated balance sheets consists of term deposits to collateralize our Sydney operating lease. Marketable Securities The Company classifies its investments in debt securities as available-for-sale at the time of purchase since it is intended that these investments are available for current operations. These investments are included within cash and cash equivalents on the accompanying consolidated balance sheets. Investments are reported at fair value and are subject to periodic impairment review. Unrealized gains and losses related to changes in the fair value of these securities are recognized in accumulated other comprehensive income (loss), net of tax, unless they are determined to be other-than-temporary impairments. The ultimate value realized on these securities is subject to market price volatility until they are sold. Fair Value Measurements The Company categorizes assets and liabilities recorded at fair value on its consolidated balance sheets based on the accounting guidance framework for measuring fair value on either a recurring or nonrecurring basis, whereby inputs used in valuation techniques are assigned a hierarchical level. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company measures assets and liabilities at fair value at each reporting period using a fair value hierarchy which requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. U.S. GAAP describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, to measure the fair value: Level 1 – observable inputs for identical assets or liabilities, such as quoted prices in active markets. Level 2 – directly or indirectly observable Inputs other than Level 1, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 – Unobservable inputs in which there is little or no market data, which requires the Company to develop its own assumptions. Financial instruments consist of cash and cash equivalents, restricted cash, marketable securities, accounts receivable and accounts payable. The Company’s investment portfolio consists of money market mutual funds, available for sales debt securities and certificates of deposit, which are carried at fair value. Accounts Receivable See Note 2, Revenue, for the Company’s accounting policy on accounts receivable. Property and Equipment, Net Property and equipment, net, are stated at cost, less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets, which are generally three years. Leasehold improvements are amortized over the shorter of the remaining lease term or the estimated useful life. Expenditures for maintenance and repairs are expensed as incurred. Significant improvements that substantially enhance the life of an asset are capitalized. Impairment of Long-Lived Assets The Company evaluates its long-lived assets or asset groups for impairment whenever events indicate that the carrying value of an asset or asset group may not be recoverable based on expected future cash flows attributable to that asset or asset group. If the carrying amount of an asset or asset group exceeds estimated undiscounted future cash flows, then an impairment charge would be recognized based on the excess of the carrying amount of the asset or asset group over its fair value. Assets to be disposed of are reported at the lower of their carrying amount or fair value less costs to sell. There were no impairment charges recognized related to long-lived assets in 2021, 2020 and 2019. Deferred Offering Costs Deferred offering costs consist primarily of accounting, legal and other fees incremental and directly related to the Company’s IPO. Upon closing of the IPO on February 5, 2021, the deferred offering costs of $5.6 million were reclassified into stockholders' equity (deficit) and recorded against the proceeds from the offering. Deferred offering costs as of December 31, 2020 was $3.2 million and is included within prepaid expenses and other current assets on the consolidated balance sheets. Revenue Recognition Revenue is recognized when a customer obtains control of promised services. The amount of revenue recognized reflects the consideration that the Company expects to receive in exchange for these services. To achieve the core principle of this standard, the Company applies the following five steps: 1. Identification of the contract, or contracts, with the customer The Company determines a contract with a customer to exist when the contract is approved, each party’s rights regarding the services to be transferred can be identified, the payment terms for the services can be identified, the customer has the ability and intent to pay, and the contract has commercial substance. At contract inception, the Company will evaluate whether two or more contracts should be combined and accounted for as a single contract and whether the combined or single contract includes more than one performance obligation. The Company applies judgment in determining the customer’s ability and intent to pay, which is based on a variety of factors, including the customer’s historical payment experience or, in the case of a new customer, credit and financial information pertaining to the customer. 2. Identification of the performance obligations in the contract Performance obligations committed to in a contract are identified based on the services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the service either on its own or together with other resources that are readily available from third parties or from the Company, and are distinct in the context of the contract, whereby the transfer of the services and the products is separately identifiable from other promises in the contract. The Company’s performance obligations generally consist of access to its digital engagement platform and related support services, which, together, are considered one performance obligation. The Company’s customers do not have the ability to take possession of the Company’s software, and, through access to the Company’s platform, the Company provides a series of distinct software-based services that are satisfied over the term of the applicable subscription. Customers may also purchase incremental capacity to the Company’s digital engagement platform. The Company recognizes incremental access as a series of distinct software-based services that are satisfied over the remaining term of the applicable subscription. The Company’s Legacy offering includes performance obligations to provide customers with access to the Company’s platform for the duration of specific contracted events, and revenue is recognized primarily as events occur. Amounts related to the Company’s digital engagement platform and Legacy offering are recorded as subscription and other platform revenue in the consolidated statements of operations. The Company also provides professional services, which includes consulting services, such as experience management, monitoring and production services, implementation services and premium support services. Professional services are generally considered distinct from the access to the Company’s digital engagement platform. Amounts are recorded as Professional Services revenue in the consolidated statements of operations. The Company enters contracts with customers that regularly include promises to transfer multiple services through access to the Company’s platform. For arrangements with multiple services, the Company evaluates whether the individual services qualify as distinct performance obligations. In its assessment of whether a service is a distinct performance obligation, the Company determines whether the customer can benefit from the service on its own or with other readily available resources and whether the service is separately identifiable from other services in the contract. This evaluation requires the Company to assess the nature of each individual service offering and how the services are provided in the context of the contract, including whether the services are significantly integrated, highly interrelated or significantly modify each other, which may require judgment based on the facts and circumstances of the contract. 3. Determination of the transaction price The transaction price is determined based on the consideration that the Company expects to be entitled in exchange for transferring services to the customer. Variable consideration is included in the transaction price if, in the Company’s judgment, it is probable that a significant future reversal of cumulative revenue recognized under the contract will not occur. The Company applies the practical expedient in paragraph 606-10-32-18 of Topic 606 and does not adjust the promised amount of consideration for the effects of a significant financing component for contracts that are one year or less, and none of our multi-year contracts contain a significant financing component. Revenue is recognized net of any taxes collected from customers (e.g., sales and other indirect taxes), which are subsequently remitted to governmental entities. The Company’s digital engagement platform and related support services are typically warranted to perform in a professional manner that will comply with the terms of our subscription agreements. In addition, the Company includes service level commitments to its customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that the Company fails to meet those service levels. These credits represent a form of variable consideration. Historically, the Company has not experienced any significant incidents affecting the defined levels of reliability and performance as required by its subscription agreements. The Company has not provided any material refunds related to these agreements in the consolidated financial statements during the periods presented. 4. Allocation of the transaction price to the performance obligations in the contract Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on each performance obligation’s relative standalone selling price (SSP). The SSP is the price at which the Company would sell a promised good or service separately to a customer. In instances where the Company does not sell or price a product or service separately, establishing SSP requires significant judgement. The Company estimates the SSP by considering available information, such as market conditions, internally approved pricing guidelines and the underlying cost of delivering the performance obligation. 5. Recognition of the revenue when, or as, a performance obligation is satisfied Revenue is recognized at the time the related performance obligation is satisfied by transferring the control of the promised service to a customer. Revenue is recognized in an amount that reflects the consideration that the Company expects to receive in exchange for those services. The Company recognizes subscription revenue on a straight-line basis over the term of the applicable contract subscription period beginning on the date access to the Company’s platform is granted. The Company recognizes revenue from consulting services related to events in the period the event occurs and the service is delivered. The Company recognizes revenue from implementation services upon completion of the services. The Company recognizes revenue from premium support offerings on a ratable basis over the applicable subscription term. Costs to Obtain a Contract The Company capitalizes sales commissions and associated payroll taxes paid to internal sales personnel and third-party referral fees that are incremental costs resulting from obtaining a contract with a customer. These costs are recorded as deferred contract acquisition costs on the consolidated balance sheets. The Company determines whether costs should be deferred based on its sales compensation plans and if the commissions are incremental and would not have occurred absent the customer contract. Sales commissions paid upon the initial acquisition of a customer contract are amortized over an estimated period of benefit of five years as the Company specifically anticipates renewals of customer contracts and commissions paid on renewal contracts are not commensurate with commissions paid on new customer contracts. Sales commissions paid upon renewal of customer contracts are amortized over the contractual renewal term. Amortization is recognized on a straight-line basis commensurate with the pattern of revenue recognition. Sales commissions paid related to professional services are amortized over the expected service period. The Company determines the period of benefit for commissions paid for the acquisition of the initial customer contract by taking into consideration the initial estimated customer life and the technological life of its platform and related significant features. Amortization of deferred contract acquisition costs was $15.2 million, $11.1 million and $7.0 million for 2021, 2020 and 2019, respectively. Amortization of deferred contract acquisition costs is included in sales and marketing expense in the consolidated statements of operations. The Company periodically reviews these deferred contract acquisition costs to determine whether events or changes in circumstances have occurred that could impact the period of benefit. The Company has no impairment losses relating to deferred contract acquisition costs during the periods presented. Cost of Revenue Subscription and Other Platform Cost of Revenue Subscription and other platform cost of revenue primarily consists of costs related to hosting the Company’s platform and providing operating support services to its customers. These costs are related to the Company’s co-located data centers, personnel-related costs such as salaries, bonuses, stock-based compensation expense, benefits costs associated with our operations and support personnel, software license fees and allocated overhead. Professional Services Cost of Revenue Professional services cost of revenue consists primarily of personnel-related costs, including stock-based compensation, third-party consulting services and allocated overhead. Research and Development Research and development expenses primarily consist of personnel-related expenses, including stock-based compensation directly associated with the Company’s research and development employees, contractor costs related to third-party development and allocated overhead. Research and development costs are expensed as incurred. Advertising Costs Advertising costs are expensed as incurred in sales and marketing expense in the consolidated statements of operations and amounted to $17.3 million, $9.2 million and $6.0 million for 2021, 2020 and 2019, respectively. Leases The Company categorizes leases at their inception as either operating or capital leases. In certain lease agreements, the Company may receive rent holidays and other incentives. For operating leases, the Company recognizes lease costs on a straight-line basis once control of the space is achieved, without regard to deferred payment terms such as rent holidays that defer the commencement date of required payments. Additionally, incentives received are treated as a reduction of costs over the term of the agreement. Stock-Based Compensation Stock-based compensation expense related to stock awards is measured based on the fair value of the awards granted and recognized on a straight-line basis over the requisite service period for each separately vesting portion of the award, which is generally three to four years for restricted stock units (RSUs) and four years for option awards. The fair value of each RSU is based on the fair value of the underlying common stock as of the grant date. The fair value of each option award and purchase right under the employee share purchase plan (ESPP) is estimated on the grant date using the Black-Scholes option pricing model. The Black-Scholes option pricing model requires the input of highly subjective assumptions, including the fair value of the underlying common stock, the risk-free interest rates, the expected term of the option, the expected volatility of the price of the Company’s common stock and the expected dividend yield of the Company’s common stock. The assumptions used to determine the fair value of the option awards represent management’s best estimates. These estimates involve inherent uncertainties and application of management’s judgement. Effective January 1, 2021, the Company elected to account for forfeited awards as they occur. Prior to 2021, the Company estimated the number of awards expected to be forfeited at the time of grant and revised its estimates in subsequent periods if the actual forfeitures differed from the estimates. This change in accounting policy did not have a material impact on the Company’s consolidated financial statements. Foreign Currency The functional currencies of the Company’s foreign subsidiaries are each country’s local currency. Assets and liabilities of the subsidiaries are translated into U.S. dollars at exchange rates in effect at the reporting date. Amounts classified in stockholders’ deficit are translated at historical exchange rates. Revenue and expenses are translated at the average exchange rates during the period. The resulting translation adjustments are recorded in accumulated other comprehensive income (loss). Foreign currency transaction gains or losses, whether realized or unrealized, are reflected in the consolidated statements of operations within other (income) expense, net, and have not been material for all periods presented. Income Taxes The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial reporting and the tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company then assess the likelihood that the resulting deferred tax assets will be realized. A valuation allowance is provided when it is more likely than not that a deferred tax asset will not be fully realized. Due to our lack of earnings history, the net deferred tax assets have been fully offset by a valuation allowance. The Company recognizes benefits of uncertain tax positions if it is more likely than not that such positions will be sustained upon examination based solely on their technical merits at the largest amount of benefit that is more likely than not to be realized upon the ultimate settlement. The Company’s policy is to recognize interest and penalties related to the underpayment of income taxes as a component of provision for income taxes. To date, there have been no interest or penalties charged in relation to the unrecognized tax benefits. Net Income (Loss) Per Share Attributable to Common Stockholders The Company calculates net income (loss) per share attributable to common stock using the two-class method required for companies with participating securities. The Company considers its convertible preferred stock and unvested common stock to be participating securities as holders of such securities have non-forfeitable dividend rights in the event of the Company’s declaration of a dividend for shares of common stock. In periods when the Company is in a net loss position, the net loss attributable to common stockholders was not allocated to the convertible preferred stock and unvested common stock under the two-class method as these securities do not have a contractual obligation to share in the Company’s losses. Distributed and undistributed earnings allocated to participating securities are subtracted from net income (loss) in determining net income (loss) attributable to common stockholders. Basic net income (loss) per share is computed by dividing net income (loss) attributable to common stockholders by the weighted-average number of shares of the Company’s common stock outstanding. The diluted net income (loss) per share attributable to common stockholders is computed by giving effect to all dilutive securities. Diluted net income (loss) per share attributable to common stockholders is computed by dividing the resulting net income (loss) attributable to common stockholders by the weighted-average number of fully diluted shares of common stock outstanding. During the periods when there is a net loss attributable to common stockholders, potentially dilutive common stock equivalents have been excluded from the calculation of diluted net loss per share attributable to common stockholders as their effect is anti-dilutive. Segment Information The Company operates in one operating segment and one reportable segment. Operating segments are defined as components of an enterprise about which separate financial information is evaluated regularly by the chief operating decision maker, who is the Company’s Chief Executive Officer, in deciding how to allocate resources and assessing performance. The Company’s chief operating decision maker allocates resources and assesses performance based upon consolidated financial information. Recently Adopted Accounting Standards In December 2019, the FASB issued ASU No. 2019-12, Income Taxes Topic 740: Simplifying the Accounting for Income Taxes, which removes a variety of exceptions within the framework of ASC 740. These include the exception to the incremental approach for intraperiod tax allocation in the event of a loss from continuing operations and income or a gain from other items (such as other comprehensive income), and the exception to using general methodology for the interim period tax accounting for year-to-date losses that exceed anticipated losses. For public business entities, ASU No. 2019-12 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. For all other entities, ASU No. 2019-12 is effective for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. Early adoption of the amendments is permitted, including adoption in any interim period for (1) public business entities for periods for which financial statements have not yet been issued and (2) all other entities for periods for which financial statements have not yet been made available for issuance. The Company adopted ASU No. 2019-12 effective January 1, 2021. The adoption of this standard did not have a material impact on its consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. This new standard requires an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. Costs for implementation activities in the application development stage can be capitalized depending on the nature of the costs, while costs incurred during the preliminary project and post-implementation stages are expensed as the activities are performed. The costs capitalized are expensed over the term of the hosting arrangement. The amendments in ASU No. 2018-15 also require the entity to present the expense related to the capitalized implementation costs in the same line item in the statement of income as the fees associated with the hosting element (service) of the arrangement and classify payments for capitalized implementation costs in the statement of cash flows in the same manner as payments made for fees associated with the hosting element. ASU No. 2018-15 is effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. For all other entities, ASU No. 2018-15 is effective for annual reporting periods beginning after December 15, 2020, and interim periods within annual periods beginning after December 15, 2021. ASU No. 2018-15 should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company adopted ASU No. 2018-15 effective January 1, 2021 using a prospective approach. The adoption of this standard did not have a material impact on its consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments Topic 326: Credit Losses Measurement of Credit Losses on Financial Instruments (Topic 326), as amended, which requires an entity to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts utilizing a new impairment model known as the current expected credit loss (CECL) model. The new guidance affects loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. For Public business entities, excluding entities eligible to be smaller reporting companies as defined by the SEC, ASU No. 2016-13, is effective for the annual periods in fiscal years beginning after December 15, 2019, and interim periods therein. For all other entities ASU No. 2016-13, is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal year. The Company has elected to use the extended transition period that allows the Company to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies under the Jumpstart Our Business Startups Act of 2012. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), as amended, to supersede existing guidance on accounting for leases in Topic 840, Leases. Topic 842 generally requires lessees to recognize operating and financing lease liabilities and corresponding right-of-use assets on the balance sheet and to provide enhanced disclosures surrounding the amount, timing and uncertainty of cash flows arising from leasing arrangements. The Company will adopt the new standard effective January 1, 2022 on a modified retrospective basis, under which we will recognize the cumulative effects of initially applying the standard as an adjustment to the opening balance of accumulated deficit on the adoption date and will not restate comparative periods. The Company will elect the package of practical expedients permitted under the transition guidance, which allows us to carry-forward our historical lease classification and our assessment on whether a contract is or contains a lease. We will also elect to apply the hindsight practical expedient which allows us to use hindsight in determining the lease term. On the adoption date, the Company estimates it will recognize on its consolidated balance sheet approximately $7.3 million of right-of-use assets, $9.9 million of lease liabilities, and derecognize existing deferred rent and lease incentives totaling approximately $2.6 million. These are preliminary estimates that are subject to change as the Company finalizes its adoption. Other than described above, we do not expect the new lease standard to have any other material impacts on our consolidated financial statements.

ON24, Inc. and its subsidiaries (together, ON24 or the Company) provides a leading, cloud-based platform for digital engagement that enables businesses to convert customer engagement into revenue through interactive webinar experiences, virtual event experiences and multimedia content experiences. The Company’s platform offers a portfolio of interactive, personalized and content-rich digital experience products that creates and captures actionable, real-time data at scale from millions of professionals every month to provide businesses with buying signals and behavioral insights to efficiently convert prospects into customers. The Company was incorporated in the state of Delaware in January 1998 as NewsDirect, Inc. and in December 1998 changed its name to ON24, Inc. The Company is headquartered in San Francisco, California.

On February 5, 2021, the Company closed its initial public offering (IPO) of 7,599,928 shares of its common stock at a public offering price of $50 per share for net proceeds of approximately $347.8 million, after deducting the underwriting discount of approximately $26.6 million and other offering costs of approximately $5.6 million. The shares of common stock sold in the IPO and the net proceeds from the IPO included the full exercise of the underwriters’ option to purchase additional shares.

The accompanying consolidated financial statements include the accounts of ON24 Inc. and its subsidiaries and have been prepared in accordance with generally accepted accounting principles in the United States of America (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) for annual financial reporting. All intercompany transactions and balances have been eliminated in consolidation.

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Significant items subject to such estimates and assumptions include, but are not limited to, the estimated expected benefit period for deferred contract acquisition costs, the determination of standalone selling price for the Company’s performance obligations, the allowance for doubtful accounts and billing reserve, the useful lives of long-lived assets, the estimated value of common stock prior to the IPO and other assumptions used to measure stock-based compensation, the valuation of deferred income tax assets and uncertain tax positions. Actual results could differ from those estimates.

The Company’s financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, marketable securities and accounts receivable. The Company maintains its cash and cash equivalents, restricted cash and marketable securities with high-quality financial institutions with investment-grade ratings. A majority of the cash balances are with banks in the U.S. and are insured to the extent defined by the Federal Deposit Insurance Corporation. For concentration of risks on accounts receivables and revenue, refer to Note 1.

Investments are reported at fair value and are subject to periodic impairment review. Unrealized gains and losses related to changes in the fair value of these securities are recognized in accumulated other comprehensive income (loss), net of tax, unless they are determined to be other-than-temporary impairments. The ultimate value realized on these securities is subject to market price volatility until they are sold.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company measures assets and liabilities at fair value at each reporting period using a fair value hierarchy which requires the Company to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. U.S. GAAP describes a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, to measure the fair value:

Property and equipment, net, are stated at cost, less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets, which are generally three years. Leasehold improvements are amortized over the shorter of the remaining lease term or the estimated useful life. Expenditures for maintenance and repairs are expensed as incurred. Significant improvements that substantially enhance the life of an asset are capitalized.

The Company evaluates its long-lived assets or asset groups for impairment whenever events indicate that the carrying value of an asset or asset group may not be recoverable based on expected future cash flows attributable to that asset or asset group. If the carrying amount of an asset or asset group exceeds estimated undiscounted future cash flows, then an impairment charge would be recognized based on the excess of the carrying amount of the asset or asset group over its fair value. Assets to be disposed of are reported at the lower of their carrying amount or fair value less costs to sell. There were no impairment charges recognized related to long-lived assets in 2021, 2020 and 2019.

Deferred offering costs consist primarily of accounting, legal and other fees incremental and directly related to the Company’s IPO. Upon closing of the IPO on February 5, 2021, the deferred offering costs of $5.6 million were reclassified into stockholders' equity (deficit) and recorded against the proceeds from the offering. Deferred offering costs as of December 31, 2020 was $3.2 million and is included within prepaid expenses and other current assets on the consolidated balance sheets.

The Company determines a contract with a customer to exist when the contract is approved, each party’s rights regarding the services to be transferred can be identified, the payment terms for the services can be identified, the customer has the ability and intent to pay, and the contract has commercial substance. At contract inception, the Company will evaluate whether two or more contracts should be combined and accounted for as a single contract and whether the combined or single contract includes more than one performance obligation. The Company applies judgment in determining the customer’s ability and intent to pay, which is based on a variety of factors, including the customer’s historical payment experience or, in the case of a new customer, credit and financial information pertaining to the customer.

Performance obligations committed to in a contract are identified based on the services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the service either on its own or together with other resources that are readily available from third parties or from the Company, and are distinct in the context of the contract, whereby the transfer of the services and the products is separately identifiable from other promises in the contract.

The Company’s performance obligations generally consist of access to its digital engagement platform and related support services, which, together, are considered one performance obligation. The Company’s customers do not have the ability to take possession of the Company’s software, and, through access to the Company’s platform, the Company provides a series of distinct software-based services that are satisfied over the term of the applicable subscription. Customers may also purchase incremental capacity to the Company’s digital engagement platform. The Company recognizes incremental access as a series of distinct software-based services that are satisfied over the remaining term of the applicable subscription. The Company’s Legacy offering includes performance obligations to provide customers with access to the Company’s platform for the duration of specific contracted events, and revenue is recognized primarily as events occur. Amounts related to the Company’s digital engagement platform and Legacy offering are recorded as subscription and other platform revenue in the consolidated statements of operations.

The Company also provides professional services, which includes consulting services, such as experience management, monitoring and production services, implementation services and premium support services. Professional services are generally considered distinct from the access to the Company’s digital engagement platform. Amounts are recorded as Professional Services revenue in the consolidated statements of operations.

The Company enters contracts with customers that regularly include promises to transfer multiple services through access to the Company’s platform. For arrangements with multiple services, the Company evaluates whether the individual services qualify as distinct performance obligations. In its assessment of whether a service is a distinct performance obligation, the Company determines whether the customer can benefit from the service on its own or with other readily available resources and whether the service is separately identifiable from other services in the contract. This evaluation requires the Company to assess the nature of each individual service offering and how the services are provided in the context of the contract, including whether the services are significantly integrated, highly interrelated or significantly modify each other, which may require judgment based on the facts and circumstances of the contract.

The transaction price is determined based on the consideration that the Company expects to be entitled in exchange for transferring services to the customer. Variable consideration is included in the transaction price if, in the Company’s judgment, it is probable that a significant future reversal of cumulative revenue recognized under the contract will not occur. The Company applies the practical expedient in paragraph 606-10-32-18 of Topic 606 and does not adjust the promised amount of consideration for the effects of a significant financing component for contracts that are one year or less, and none of our multi-year contracts contain a significant financing component. Revenue is recognized net of any taxes collected from customers (e.g., sales and other indirect taxes), which are subsequently remitted to governmental entities.

The Company’s digital engagement platform and related support services are typically warranted to perform in a professional manner that will comply with the terms of our subscription agreements. In addition, the Company includes service level commitments to its customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that the Company fails to meet those service levels. These credits represent a form of variable consideration. Historically, the Company has not experienced any significant incidents affecting the defined levels of reliability and performance as required by its subscription agreements. The Company has not provided any material refunds related to these agreements in the consolidated financial statements during the periods presented.

Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on each performance obligation’s relative standalone selling price (SSP). The SSP is the price at which the Company would sell a promised good or service separately to a customer. In instances where the Company does not sell or price a product or service separately, establishing SSP requires significant judgement. The Company estimates the SSP by considering available information, such as market conditions, internally approved pricing guidelines and the underlying cost of delivering the performance obligation.

Revenue is recognized at the time the related performance obligation is satisfied by transferring the control of the promised service to a customer. Revenue is recognized in an amount that reflects the consideration that the Company expects to receive in exchange for those services. The Company recognizes subscription revenue on a straight-line basis over the term of the applicable contract subscription period beginning on the date access to the Company’s platform is granted. The Company recognizes revenue from consulting services related to events in the period the event occurs and the service is delivered. The Company recognizes revenue from implementation services upon completion of the services. The Company recognizes revenue from premium support offerings on a ratable basis over the applicable subscription term.

The Company capitalizes sales commissions and associated payroll taxes paid to internal sales personnel and third-party referral fees that are incremental costs resulting from obtaining a contract with a customer. These costs are recorded as deferred contract acquisition costs on the consolidated balance sheets. The Company determines whether costs should be deferred based on its sales compensation plans and if the commissions are incremental and would not have occurred absent the customer contract.

Sales commissions paid upon the initial acquisition of a customer contract are amortized over an estimated period of benefit of five years as the Company specifically anticipates renewals of customer contracts and commissions paid on renewal contracts are not commensurate with commissions paid on new customer contracts. Sales commissions paid upon renewal of customer contracts are amortized over the contractual renewal term. Amortization is recognized on a straight-line basis commensurate with the pattern of revenue recognition. Sales commissions paid related to professional services are amortized over the expected service period. The Company determines the period of benefit for commissions paid for the acquisition of the initial customer contract by taking into consideration the initial estimated customer life and the technological life of its platform and related significant features. Amortization of deferred contract acquisition costs was $15.2 million, $11.1 million and $7.0 million for 2021, 2020 and 2019, respectively. Amortization of deferred contract acquisition costs is included in sales and marketing expense in the consolidated statements of operations.

Subscription and other platform cost of revenue primarily consists of costs related to hosting the Company’s platform and providing operating support services to its customers. These costs are related to the Company’s co-located data centers, personnel-related costs such as salaries, bonuses, stock-based compensation expense, benefits costs associated with our operations and support personnel, software license fees and allocated overhead.

The Company categorizes leases at their inception as either operating or capital leases. In certain lease agreements, the Company may receive rent holidays and other incentives. For operating leases, the Company recognizes lease costs on a straight-line basis once control of the space is achieved, without regard to deferred payment terms such as rent holidays that defer the commencement date of required payments. Additionally, incentives received are treated as a reduction of costs over the term of the agreement.

The fair value of each option award and purchase right under the employee share purchase plan (ESPP) is estimated on the grant date using the Black-Scholes option pricing model. The Black-Scholes option pricing model requires the input of highly subjective assumptions, including the fair value of the underlying common stock, the risk-free interest rates, the expected term of the option, the expected volatility of the price of the Company’s common stock and the expected dividend yield of the Company’s common stock. The assumptions used to determine the fair value of the option awards represent management’s best estimates. These estimates involve inherent uncertainties and application of management’s judgement.

Effective January 1, 2021, the Company elected to account for forfeited awards as they occur. Prior to 2021, the Company estimated the number of awards expected to be forfeited at the time of grant and revised its estimates in subsequent periods if the actual forfeitures differed from the estimates. This change in accounting policy did not have a material impact on the Company’s consolidated financial statements.

The functional currencies of the Company’s foreign subsidiaries are each country’s local currency. Assets and liabilities of the subsidiaries are translated into U.S. dollars at exchange rates in effect at the reporting date. Amounts classified in stockholders’ deficit are translated at historical exchange rates. Revenue and expenses are translated at the average exchange rates during the period. The resulting translation adjustments are recorded in accumulated other comprehensive income (loss). Foreign currency transaction gains or losses, whether realized or unrealized, are reflected in the consolidated statements of operations within other (income) expense, net, and have not been material for all periods presented.

The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial reporting and the tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company then assess the likelihood that the resulting deferred tax assets will be realized. A valuation allowance is provided when it is more likely than not that a deferred tax asset will not be fully realized. Due to our lack of earnings history, the net deferred tax assets have been fully offset by a valuation allowance.

The Company recognizes benefits of uncertain tax positions if it is more likely than not that such positions will be sustained upon examination based solely on their technical merits at the largest amount of benefit that is more likely than not to be realized upon the ultimate settlement. The Company’s policy is to recognize interest and penalties related to the underpayment of income taxes as a component of provision for income taxes. To date, there have been no interest or penalties charged in relation to the unrecognized tax benefits.

The Company calculates net income (loss) per share attributable to common stock using the two-class method required for companies with participating securities. The Company considers its convertible preferred stock and unvested common stock to be participating securities as holders of such securities have non-forfeitable dividend rights in the event of the Company’s declaration of a dividend for shares of common stock. In periods when the Company is in a net loss position, the net loss attributable to common stockholders was not allocated to the convertible preferred stock and unvested common stock under the two-class method as these securities do not have a contractual obligation to share in the Company’s losses.

The diluted net income (loss) per share attributable to common stockholders is computed by giving effect to all dilutive securities. Diluted net income (loss) per share attributable to common stockholders is computed by dividing the resulting net income (loss) attributable to common stockholders by the weighted-average number of fully diluted shares of common stock outstanding. During the periods when there is a net loss attributable to common stockholders, potentially dilutive common stock equivalents have been excluded from the calculation of diluted net loss per share attributable to common stockholders as their effect is anti-dilutive.

The Company operates in one operating segment and one reportable segment. Operating segments are defined as components of an enterprise about which separate financial information is evaluated regularly by the chief operating decision maker, who is the Company’s Chief Executive Officer, in deciding how to allocate resources and assessing performance. The Company’s chief operating decision maker allocates resources and assesses performance based upon consolidated financial information.

In December 2019, the FASB issued ASU No. 2019-12, Income Taxes Topic 740: Simplifying the Accounting for Income Taxes, which removes a variety of exceptions within the framework of ASC 740. These include the exception to the incremental approach for intraperiod tax allocation in the event of a loss from continuing operations and income or a gain from other items (such as other comprehensive income), and the exception to using general methodology for the interim period tax accounting for year-to-date losses that exceed anticipated losses. For public business entities, ASU No. 2019-12 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. For all other entities, ASU No. 2019-12 is effective for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. Early adoption of the amendments is permitted, including adoption in any interim period for (1) public business entities for periods for which financial statements have not yet been issued and (2) all other entities for periods for which financial statements have not yet been made available for issuance. The Company adopted ASU No. 2019-12 effective January 1, 2021. The adoption of this standard did not have a material impact on its consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. This new standard requires an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. Costs for implementation activities in the application development stage can be capitalized depending on the nature of the costs, while costs incurred during the preliminary project and post-implementation stages are expensed as the activities are performed. The costs capitalized are expensed over the term of the hosting arrangement. The amendments in ASU No. 2018-15 also require the entity to present the expense related to the capitalized implementation costs in the same line item in the statement of income as the fees associated with the hosting element (service) of the arrangement and classify payments for capitalized implementation costs in the statement of cash flows in the same manner as payments made for fees associated with the hosting element. ASU No. 2018-15 is effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. For all other entities, ASU No. 2018-15 is effective for annual reporting periods beginning after December 15, 2020, and interim periods within annual periods beginning after December 15, 2021. ASU No. 2018-15 should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company adopted ASU No. 2018-15 effective January 1, 2021 using a prospective approach. The adoption of this standard did not have a material impact on its consolidated financial statements.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments Topic 326: Credit Losses Measurement of Credit Losses on Financial Instruments (Topic 326), as amended, which requires an entity to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts utilizing a new impairment model known as the current expected credit loss (CECL) model. The new guidance affects loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. For Public business entities, excluding entities eligible to be smaller reporting companies as defined by the SEC, ASU No. 2016-13, is effective for the annual periods in fiscal years beginning after December 15, 2019, and interim periods therein. For all other entities ASU No. 2016-13, is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal year. The Company has elected to use the extended transition period that allows the Company to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies under the Jumpstart Our Business Startups Act of 2012.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), as amended, to supersede existing guidance on accounting for leases in Topic 840, Leases. Topic 842 generally requires lessees to recognize operating and financing lease liabilities and corresponding right-of-use assets on the balance sheet and to provide enhanced disclosures surrounding the amount, timing and uncertainty of cash flows arising from leasing arrangements.

The Company will adopt the new standard effective January 1, 2022 on a modified retrospective basis, under which we will recognize the cumulative effects of initially applying the standard as an adjustment to the opening balance of accumulated deficit on the adoption date and will not restate comparative periods. The Company will elect the package of practical expedients permitted under the transition guidance, which allows us to carry-forward our historical lease classification and our assessment on whether a contract is or contains a lease. We will also elect to apply the hindsight practical expedient which allows us to use hindsight in determining the lease term. On the adoption date, the Company estimates it will recognize on its consolidated balance sheet approximately $7.3 million of right-of-use assets, $9.9 million of lease liabilities, and derecognize existing deferred rent and lease incentives totaling approximately $2.6 million. These are preliminary estimates that are subject to change as the Company finalizes its adoption.