Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Principles of Consolidation The accompanying interim condensed consolidated financial statements and accompanying notes have been prepared in conformity with accounting principles generally accepted in the United States (U.S. GAAP) and applicable regulations of the Security and Exchange Commission (SEC) regarding interim financial reporting, and include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The Company’s fiscal year ends on December 31. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the applicable required disclosures and regulations of the SEC. Therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes thereto, included in the Company’s final prospectus for its initial public offering (IPO) filed with the SEC pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended (File No. 333-233296) on September 13, 2019 (Prospectus). Initial Public Offering In September 2019, the Company completed an IPO in which it issued and sold 40,250,000 shares of Class A common stock, which included 5,250,000 shares sold pursuant to the exercise by the underwriters of an option to purchase additional shares, at the public offering price of $15.00 per share. The Company received net proceeds of $570.5 million from sales of its shares in the IPO, after deducting underwriting discounts and commissions, but before deducting offering costs of $5.5 million. The net proceeds included proceeds of $74.4 million, net of underwriters' discounts and commissions, from the exercise of the underwriters' option to purchase an additional 5,250,000 shares of the Company's Class A common stock. Upon completion of the IPO, 31,381,152 shares of redeemable convertible preferred stock were automatically converted into an equal number of shares of Class A common stock, 134,276,690 shares of redeemable convertible preferred stock were automatically converted into an equal number of shares of Class B common stock, outstanding warrants to purchase shares of redeemable convertible preferred stock were automatically converted into outstanding warrants to purchase shares of Class B common stock, and 15,198,587 shares of Class B common stock held by former employees were automatically converted into an equal number of shares of Class A common stock. Deferred Offering Costs Deferred offering costs are capitalized and consist of fees and expenses incurred in connection with the sale of the Company's Class A common stock in the IPO, including the legal, accounting, printing and other IPO-related costs. As of December 31, 2018, the Company had not incurred such costs. During 2019, the Company capitalized $5.5 million of offering costs. In September 2019, upon completion of the IPO, the Company reclassified $5.5 million of offering costs into stockholders' equity (deficit) as a reduction of the net proceeds received from the IPO. During the nine months ended September 30, 2019, the Company paid $3.7 million of the deferred offering costs. Unaudited Interim Condensed Consolidated Financial Information The accompanying interim condensed consolidated balance sheet as of September 30, 2019, the condensed consolidated statements of operations and of comprehensive loss for the three and nine months ended September 30, 2019 and 2018, the condensed consolidated statements of cash flows for the nine months ended September 30, 2019 and 2018, the condensed consolidated statements of redeemable convertible preferred stock and stockholders’ equity (deficit) for the three and nine months ended September 30, 2019 and 2018, and the related footnote disclosures are unaudited. These unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. GAAP. In management’s opinion, the unaudited interim condensed consolidated financial statements include all adjustments necessary to state fairly the Company’s financial position as of September 30, 2019, its results of operations for the three and nine months ended September 30, 2019 and 2018, and its cash flows for the nine months ended September 30, 2019 and 2018. The results for the three and nine months ended September 30, 2019 are not necessarily indicative of the results expected for the full year ending December 31, 2019 or any future period. The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Prospectus. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the condensed consolidated financial statements and accompanying notes to the condensed consolidated financial statements. Such estimates include, but are not limited to, deferred contract acquisitions costs, the period of benefit generated from the Company’s deferred contract acquisition costs, the capitalization and estimated useful life of internal-use software, useful lives of property and equipment, the valuation and recognition of stock-based compensation expense, uncertain tax positions, and the recognition and measurement of current and deferred income tax assets and liabilities. Management bases these estimates and assumptions on historical experience and on various other assumptions that are believed to be reasonable. Actual results could differ materially from these estimates. Significant Accounting Policies The Company's significant accounting policies are discussed in the "Notes to Consolidated Financial Statements, Note 2. Basis of Presentation and Summary of Significant Accounting Policies" in the Prospectus. There have been no significant changes to these policies that have had a material impact on the Company's condensed consolidated financial statements and related notes, except as noted below. Stock-based Compensation The Company measures and recognizes stock-based compensation expense based on the grant date fair value of the awards. The grant date fair value of stock options is estimated using the Black-Scholes option pricing model. The grant date fair value of restricted stock units (RSUs) is estimated based on the fair value of the Company's underlying common stock. The grant date fair value and the stock-based compensation expense related to purchase rights issued under the 2019 Employee Stock Purchase Plan (ESPP) is estimated using the Black-Scholes option pricing model and is based on the estimated number of awards as of the beginning of the offering period, respectively. The Black-Scholes option pricing model requires the use of highly subjective assumptions, including the award’s expected term, the fair value of the underlying common stock, the expected volatility of the price of the common stock, risk-free interest rates, and the expected dividend yield of the common stock. The assumptions used to determine the fair value of the stock-based awards are management’s best estimates and involve inherent uncertainties and the application of judgment. Stock-based compensation expense for awards with service-based vesting only is recognized on a straight-line basis over the requisite service period of the awards, which is generally four years. The Company accounts for forfeitures as they occur. Prior to the IPO, the fair value of the Company's common stock for financial reporting purposes was determined considering numerous objective and subjective factors and required judgment to determine the fair value of common stock as of each grant date. Subsequent to the IPO, the Company determines the fair value using the market closing price of its Class A common stock on the date of grant. The Company has granted qualified event options (QE Options) and qualified event restricted stock units (QE RSUs) to employees and contractors which vest on the satisfaction of both a service-based condition and a performance condition. For QE Options, the performance condition was deemed satisfied upon the Company's Class A common stock being listed on a public exchange. For QE Options, the service-based condition is satisfied by rendering service from the date of grant through the qualifying event, as well as a four-year vesting period commencing with the qualifying event. For QE RSUs, the performance condition was deemed satisfied upon the effective date of the Company's registration statement on Form S-1 filed with the SEC in connection with the IPO. The QE RSUs have a service-based vesting condition satisfied over a four-year vesting period. Awards which contain both service-based and performance conditions are recognized using the accelerated attribution method once the performance condition is probable of occurring. The listing of equity securities event and effectiveness of a registration statement event are not deemed probable until consummated. In connection with the Company’s IPO, the Company recognized $21.0 million of cumulative stock-based compensation expense for the QE Options for the service period rendered from the date of grant through the equity securities listing date and for the QE RSUs that vested in connection with the effective date of the Company's registration statement on Form S-1 and began recording the remaining unrecognized stock-based compensation expense over the remainder of the requisite service period. Net Loss per Share Attributable to Common Stockholders Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for multiple classes of common stock and participating securities. The Company considers its previously outstanding redeemable convertible preferred stock to be participating securities. The Company also considers any shares issued on the early exercise of stock options subject to repurchase to be participating securities because holders of such shares have nonforfeitable dividend rights in the event a dividend is paid on common stock. Under the two-class method, net income is attributed to common stockholders and participating securities based on their participation rights. The holders of the redeemable convertible preferred stock, as well as the holders of early exercised shares subject to repurchase, do not have a contractual obligation to share in the losses of the Company. As such, the Company’s net losses for the three and nine months ended September 30, 2019 and 2018 were not allocated to these participating securities. The rights, including the liquidation and dividend rights, of the Class A common stock and Class B common stock are substantially identical, other than voting rights. Accordingly, the Class A common stock and Class B common stock shared proportionately in the Company’s net losses. Prior to the nine months ending September 30, 2019, there were no shares of Class A common stock issued and outstanding. Under the two-class method, basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. Vested RSUs that have not been settled have been included in the appropriate common share class used to calculate basic net loss per share. Diluted net loss per share attributable to common stockholders adjusts basic net loss per share for the effect of dilutive securities, including awards under the Company's equity incentive plans. As the Company has reported losses for all periods presented, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share. Upon completion of the IPO, all shares of redeemable convertible preferred stock then outstanding were automatically converted into an equivalent number of shares of common stock on a one-to-one basis and their carrying amount reclassified into stockholders' equity (deficit). As of September 30, 2019, there were no shares of redeemable convertible preferred stock issued and outstanding. Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements In July 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-11, Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception. This ASU reduces the complexity associated with an issuer’s accounting for certain financial instruments with characteristics of liabilities and equity. Specifically, the FASB determined that a down round feature would no longer cause a freestanding equity-linked financial instrument (or an embedded conversion option) to be accounted for as a derivative liability at fair value with changes in fair value recognized in current earnings. For public business entities, it is effective for fiscal years beginning after December 15, 2018, and interim periods therein. For all other entities, it is effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company adopted this guidance effective September 30, 2019 using the prospective approach. The adoption of ASU 2017-11 did not have a material impact on the condensed consolidated financial statements. In February 2018, the FASB issued ASU No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which provides financial statement preparers with an option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act (or portion thereof) is recorded. For all entities, it is effective for fiscal years beginning after December 15, 2018, and interim periods therein. Early adoption is permitted. The amendments in this ASU should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. The Company adopted this ASU effective January 1, 2019, noting no material impact on the Company’s condensed consolidated financial statements. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), and since that date, has issued several ASUs to further clarify certain aspects of ASU 2016-02 and provide entities with practical expedients that may be elected upon adoption. ASU 2016-02 introduces the recognition of right-of-use assets and lease liabilities by lessees for all leases on the condensed consolidated balance sheets. For the consolidated statements of operations, the ASU retains the distinction between finance leases and operating leases, with the classification criteria for distinguishing between finance leases and operating leases are substantially similar to the previous lease guidance. During the transition period for this ASU, lessees and lessors are required to recognize and measure leases at either the beginning of the earliest period presented using a modified retrospective approach, or at the adoption date recognizing the cumulative effect adjustment to the opening balance of retained earnings in the period of adoption. The effective date and transition requirements of ASU 2016-02, for public business entities, is interim and annual periods beginning on or after December 15, 2018, with early adoption permitted. For all other entities, ASU 2016-02 is effective for annual periods beginning on or after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. The Company intends to adopt the ASU beginning January 1, 2020, and has elected to apply the alternate transition method by recording a cumulative-effect adjustment to the opening balance of retained earnings (accumulated deficit) in the period of adoption. The Company is currently evaluating the effect that this ASU will have on its consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (ASC 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement. This guidance provides that implementation costs be evaluated for capitalization using the same criteria as that used for internal-use software development costs, with amortization expense being recorded in the same income statement expense line as the hosted service costs and over the expected term of the hosting arrangement. For public business entities, it is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. For all other entities, it is effective for fiscal years beginning after December 15, 2020, and interim periods beginning after December 15, 2021. Early adoption of the amendments in this update is permitted, including adoption in any interim period, for all entities. The Company is currently evaluating the potential impact of this ASU on its consolidated financial statements.

The accompanying interim condensed consolidated financial statements and accompanying notes have been prepared in conformity with accounting principles generally accepted in the United States (U.S. GAAP) and applicable regulations of the Security and Exchange Commission (SEC) regarding interim financial reporting, and include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The Company’s fiscal year ends on December 31.

Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the applicable required disclosures and regulations of the SEC. Therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the related notes thereto, included in the Company’s final prospectus for its initial public offering (IPO) filed with the SEC pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended (File No. 333-233296) on September 13, 2019 (Prospectus).

In September 2019, the Company completed an IPO in which it issued and sold 40,250,000 shares of Class A common stock, which included 5,250,000 shares sold pursuant to the exercise by the underwriters of an option to purchase additional shares, at the public offering price of $15.00 per share. The Company received net proceeds of $570.5 million from sales of its shares in the IPO, after deducting underwriting discounts and commissions, but before deducting offering costs of $5.5 million. The net proceeds included proceeds of $74.4 million, net of underwriters' discounts and commissions, from the exercise of the underwriters' option to purchase an additional 5,250,000 shares of the Company's Class A common stock. Upon completion of the IPO, 31,381,152 shares of redeemable convertible preferred stock were automatically converted into an equal number of shares of Class A common stock, 134,276,690 shares of redeemable convertible preferred stock were automatically converted into an equal number of shares of Class B common stock, outstanding warrants to purchase shares of redeemable convertible preferred stock were automatically converted into outstanding warrants to purchase shares of Class B common stock, and 15,198,587 shares of Class B common stock held by former employees were automatically converted into an equal number of shares of Class A common stock.

Deferred offering costs are capitalized and consist of fees and expenses incurred in connection with the sale of the Company's Class A common stock in the IPO, including the legal, accounting, printing and other IPO-related costs. As of December 31, 2018, the Company had not incurred such costs. During 2019, the Company capitalized $5.5 million of offering costs. In September 2019, upon completion of the IPO, the Company reclassified $5.5 million of offering costs into stockholders' equity (deficit) as a reduction of the net proceeds received from the IPO. During the nine months ended September 30, 2019, the Company paid $3.7 million of the deferred offering costs.

The accompanying interim condensed consolidated balance sheet as of September 30, 2019, the condensed consolidated statements of operations and of comprehensive loss for the three and nine months ended September 30, 2019 and 2018, the condensed consolidated statements of cash flows for the nine months ended September 30, 2019 and 2018, the condensed consolidated statements of redeemable convertible preferred stock and stockholders’ equity (deficit) for the three and nine months ended September 30, 2019 and 2018, and the related footnote disclosures are unaudited. These unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. GAAP. In management’s opinion, the unaudited interim condensed consolidated financial statements include all adjustments necessary to state fairly the Company’s financial position as of September 30, 2019, its results of operations for the three and nine months ended September 30, 2019 and 2018, and its cash flows for the nine months ended September 30, 2019 and 2018. The results for the three and nine months ended September 30, 2019 are not necessarily indicative of the results expected for the full year ending December 31, 2019 or any future period. The unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Prospectus.

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the condensed consolidated financial statements and accompanying notes to the condensed consolidated financial statements. Such estimates include, but are not limited to, deferred contract acquisitions costs, the period of benefit generated from the Company’s deferred contract acquisition costs, the capitalization and estimated useful life of internal-use software, useful lives of property and equipment, the valuation and recognition of stock-based compensation expense, uncertain tax positions, and the recognition and measurement of current and deferred income tax assets and liabilities. Management bases these estimates and assumptions on historical experience and on various other assumptions that are believed to be reasonable. Actual results could differ materially from these estimates.

The Company's significant accounting policies are discussed in the "Notes to Consolidated Financial Statements, Note 2. Basis of Presentation and Summary of Significant Accounting Policies" in the Prospectus. There have been no significant changes to these policies that have had a material impact on the Company's condensed consolidated financial statements and related notes, except as noted below.

The Company measures and recognizes stock-based compensation expense based on the grant date fair value of the awards. The grant date fair value of stock options is estimated using the Black-Scholes option pricing model. The grant date fair value of restricted stock units (RSUs) is estimated based on the fair value of the Company's underlying common stock. The grant date fair value and the stock-based compensation expense related to purchase rights issued under the 2019 Employee Stock Purchase Plan (ESPP) is estimated using the Black-Scholes option pricing model and is based on the estimated number of awards as of the beginning of the offering period, respectively.

The Black-Scholes option pricing model requires the use of highly subjective assumptions, including the award’s expected term, the fair value of the underlying common stock, the expected volatility of the price of the common stock, risk-free interest rates, and the expected dividend yield of the common stock. The assumptions used to determine the fair value of the stock-based awards are management’s best estimates and involve inherent uncertainties and the application of judgment. Stock-based compensation expense for awards with service-based vesting only is recognized on a straight-line basis over the requisite service period of the awards, which is generally four years. The Company accounts for forfeitures as they occur.

Prior to the IPO, the fair value of the Company's common stock for financial reporting purposes was determined considering numerous objective and subjective factors and required judgment to determine the fair value of common stock as of each grant date. Subsequent to the IPO, the Company determines the fair value using the market closing price of its Class A common stock on the date of grant.

The Company has granted qualified event options (QE Options) and qualified event restricted stock units (QE RSUs) to employees and contractors which vest on the satisfaction of both a service-based condition and a performance condition. For QE Options, the performance condition was deemed satisfied upon the Company's Class A common stock being listed on a public exchange. For QE Options, the service-based condition is satisfied by rendering service from the date of grant through the qualifying event, as well as a four-year vesting period commencing with the qualifying event. For QE RSUs, the performance condition was deemed satisfied upon the effective date of the Company's registration statement on Form S-1 filed with the SEC in connection with the IPO. The QE RSUs have a service-based vesting condition satisfied over a four-year vesting period. Awards which contain both service-based and performance conditions are recognized using the accelerated attribution method once the performance condition is probable of occurring. The listing of equity securities event and effectiveness of a registration statement event are not deemed probable until consummated. In connection with the Company’s IPO, the Company recognized $21.0 million of cumulative stock-based compensation expense for the QE Options for the service period rendered from the date of grant through the equity securities listing date and for the QE RSUs that vested in connection with the effective date of the Company's registration statement on Form S-1 and began recording the remaining unrecognized stock-based compensation expense over the remainder of the requisite service period.

Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for multiple classes of common stock and participating securities. The Company considers its previously outstanding redeemable convertible preferred stock to be participating securities. The Company also considers any shares issued on the early exercise of stock options subject to repurchase to be participating securities because holders of such shares have nonforfeitable dividend rights in the event a dividend is paid on common stock. Under the two-class method, net income is attributed to common stockholders and participating securities based on their participation rights. The holders of the redeemable convertible preferred stock, as well as the holders of early exercised shares subject to repurchase, do not have a contractual obligation to share in the losses of the Company. As such, the Company’s net losses for the three and nine months ended September 30, 2019 and 2018 were not allocated to these participating securities. The rights, including the liquidation and dividend rights, of the Class A common stock and Class B common stock are substantially identical, other than voting rights. Accordingly, the Class A common stock and Class B common stock shared proportionately in the Company’s net losses. Prior to the nine months ending September 30, 2019, there were no shares of Class A common stock issued and outstanding.

Under the two-class method, basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. Vested RSUs that have not been settled have been included in the appropriate common share class used to calculate basic net loss per share.

Diluted net loss per share attributable to common stockholders adjusts basic net loss per share for the effect of dilutive securities, including awards under the Company's equity incentive plans. As the Company has reported losses for all periods presented, all potentially dilutive securities are antidilutive and accordingly, basic net loss per share equals diluted net loss per share.

Upon completion of the IPO, all shares of redeemable convertible preferred stock then outstanding were automatically converted into an equivalent number of shares of common stock on a one-to-one basis and their carrying amount reclassified into stockholders' equity (deficit). As of September 30, 2019, there were no shares of redeemable convertible preferred stock issued and outstanding.

In July 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-11, Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception. This ASU reduces the complexity associated with an issuer’s accounting for certain financial instruments with characteristics of

liabilities and equity. Specifically, the FASB determined that a down round feature would no longer cause a freestanding equity-linked financial instrument (or an embedded conversion option) to be accounted for as a derivative liability at fair value with changes in fair value recognized in current earnings. For public business entities, it is effective for fiscal years beginning after December 15, 2018, and interim periods therein. For all other entities, it is effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2019. Early adoption is permitted. The Company adopted this guidance effective September 30, 2019 using the prospective approach. The adoption of ASU 2017-11 did not have a material impact on the condensed consolidated financial statements.

In February 2018, the FASB issued ASU No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which provides financial statement preparers with an option to reclassify stranded tax effects within accumulated other comprehensive income to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act (or portion thereof) is recorded. For all entities, it is effective for fiscal years beginning after December 15, 2018, and interim periods therein. Early adoption is permitted. The amendments in this ASU should be applied either in the period of adoption or retrospectively to each period (or periods) in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. The Company adopted this ASU effective January 1, 2019, noting no material impact on the Company’s condensed consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), and since that date, has issued several ASUs to further clarify certain aspects of ASU 2016-02 and provide entities with practical expedients that may be elected upon adoption. ASU 2016-02 introduces the recognition of right-of-use assets and lease liabilities by lessees for all leases on the condensed consolidated balance sheets. For the consolidated statements of operations, the ASU retains the distinction between finance leases and operating leases, with the classification criteria for distinguishing between finance leases and operating leases are substantially similar to the previous lease guidance. During the transition period for this ASU, lessees and lessors are required to recognize and measure leases at either the beginning of the earliest period presented using a modified retrospective approach, or at the adoption date recognizing the cumulative effect adjustment to the opening balance of retained earnings in the period of adoption. The effective date and transition requirements of ASU 2016-02, for public business entities, is interim and annual periods beginning on or after December 15, 2018, with early adoption permitted. For all other entities, ASU 2016-02 is effective for annual periods beginning on or after December 15, 2019, and interim periods within annual periods beginning after December 15, 2020. Early adoption is permitted. The Company intends to adopt the ASU beginning January 1, 2020, and has elected to apply the alternate transition method by recording a cumulative-effect adjustment to the opening balance of retained earnings (accumulated deficit) in the period of adoption. The Company is currently evaluating the effect that this ASU will have on its consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (ASC 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement. This guidance provides that implementation costs be evaluated for capitalization using the same criteria as that used for internal-use software development costs, with amortization expense being recorded in the same income statement expense line as the hosted service costs and over the expected term of the hosting arrangement. For public business entities, it is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. For all other entities, it is effective for fiscal years beginning after December 15, 2020, and interim periods beginning after December 15, 2021. Early adoption of the amendments in this update is permitted, including adoption in any interim period, for all entities. The Company is currently evaluating the potential impact of this ASU on its consolidated financial statements.