Description of Business and Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Consolidation	The accompanying unaudited condensed consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements included in our Annual Report on Form 10-K and in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to state fairly the Company’s financial position, results of operations, comprehensive income and cash flows for the periods presented, but are not necessarily indicative of the results of operations to be anticipated of any future annual or interim periods. Certain information and disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to rules and regulations of the Securities and Exchange Commission. Accordingly, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2020.
Basis of Presentation	The accompanying unaudited condensed consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements included in our Annual Report on Form 10-K and in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to state fairly the Company’s financial position, results of operations, comprehensive income and cash flows for the periods presented, but are not necessarily indicative of the results of operations to be anticipated of any future annual or interim periods. Certain information and disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to rules and regulations of the Securities and Exchange Commission. Accordingly, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2020.
Use of Estimates	Use of Estimates The preparation of the condensed consolidated financial statements in conformity with GAAP requires that management 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Significant estimates and assumptions made in the accompanying condensed consolidated financial statements, which management believes are critical in understanding and evaluating the Company’s reported financial results include: (i) fair value determinations; (ii) stock-based compensation; (iii) consolidation of VIEs; and (iv) provision for income taxes, net of valuation allowance for deferred tax assets. The Company bases its estimates on various factors it believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could affect the results of operations reported in future periods.
Stock-Based Compensation	Stock-Based Compensation The Company issues stock options and restricted stock units (“RSUs”) to employees and nonemployees, including directors and third-party service providers, and employee stock purchase rights granted under the Company’s employee stock purchase plan (“ESPP”). Stock options and employee stock purchase rights granted under the ESPP are initially measured at fair value at the date of grant using the Black-Scholes option-pricing model. RSUs are measured at the fair market value of our common stock at the grant date. Stock-based compensation expenses are recognized based on their respective grant-date fair values. Forfeitures are estimated at the time of grant and revised, as necessary, in subsequent periods if actual forfeitures differ from initial estimates. Stock-based compensation expense is recorded net of estimated forfeitures, such that the expense is recorded only for those stock options that are expected to vest.
Recently Adopted And Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements The Company adopted the following accounting standards during the three months ended March 31, 2021: In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which requires a customer in a hosting arrangement that is a service contract to follow the internal-use software guidance in Topic 350-40 to determine which implementation costs to capitalize as assets or expense as incurred. The standard is effective January 1, 2021 for emerging growth companies that have adopted the private company relief. The amendments in this ASU can be applied either retrospectively or prospectively to all implementation costs after the date of adoption. The guidance became effective on January 1, 2021 and the Company adopted the standard on a prospective basis. The adoption of the standard did not have a material impact on the Company’s financial statements or related disclosures. In August 2020, the FASB issued ASU No. 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies accounting for convertible instruments by removing major separation models required under current U.S. GAAP. The standard removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception and also simplifies the diluted earnings per share calculation in certain areas The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2021, and interim periods within those fiscal years. The amendment is to be adopted through either a fully retrospective or modified retrospective method of transition. Early adoption is permitted. The Company early adopted ASU 2020-06 on January 1, 2021 with no material impact on the Company’s financial statements or related disclosures. Recently Issued Accounting Pronouncements In June 2016, the FASB amended guidance related to impairment of financial instruments as part of ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which will be effective January 1, 2023 for emerging growth companies that have adopted the private company relief. The guidance replaces the incurred loss impairment methodology with an expected credit loss model for which a company recognizes an allowance based on the estimate of expected credit loss. The Company accounts for its loans at fair value through net income, which is outside the scope of Topic 326. For available for sale debt securities, the guidance will require recognition of expected credit losses by recognizing an allowance for credit losses when the fair value of the security is below amortized cost and the recognition of this allowance is limited to the difference between the security’s amortized cost basis and fair value. The Company is evaluating the impact this ASU will have on its condensed consolidated balance sheets, condensed consolidated statements of operations and comprehensive income, condensed consolidated statements of cash flows and related disclosures. The Company plans to adopt Topic 326 effective as of January 1, 2023. In March 2020 the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting followed by and ASU 2021-01, Reference Rate Reform, Scope issued in January 2021. ASU 2020-04 and ASU 2021-01 provide temporary optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions that reference the London Interbank Offered Rate or another reference rate expected to be discontinued because of reference rate reform, if certain criteria are met. The guidance in ASU 2020-04 and ASU 2021-01 was effective upon issuance and, once adopted, may be applied prospectively to contract modifications and hedging relationships through December 31, 2022. The Company is currently evaluating the impact of the adoption of ASU 2020-04 and ASU 2021-01 on its condensed consolidated financial statements and related disclosures.

Description of Business and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying unaudited condensed consolidated financial statements have been prepared on the same basis as the annual consolidated financial statements included in our Annual Report on Form 10-K and in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to state fairly the Company’s financial position, results of operations, comprehensive income and cash flows for the periods presented, but are not necessarily indicative of the results of operations to be anticipated of any future annual or interim periods.

Certain information and disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to rules and regulations of the Securities and Exchange Commission. Accordingly, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2020.

Basis of Presentation

Use of Estimates

The preparation of the condensed consolidated financial statements in conformity with GAAP requires that management 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods.

Significant estimates and assumptions made in the accompanying condensed consolidated financial statements, which management believes are critical in understanding and evaluating the Company’s reported financial results include: (i) fair value determinations; (ii) stock-based compensation; (iii) consolidation of VIEs; and (iv) provision for income taxes, net of valuation allowance for deferred tax assets. The Company bases its estimates on various factors it believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could affect the results of operations reported in future periods.

Stock-Based Compensation

The Company issues stock options and restricted stock units (“RSUs”) to employees and nonemployees, including directors and third-party service providers, and employee stock purchase rights granted under the Company’s employee stock purchase plan (“ESPP”). Stock options and employee stock purchase rights granted under the ESPP are initially measured at fair value at the date of grant using the Black-Scholes option-pricing model. RSUs are measured at the fair market value of our common stock at the grant date. Stock-based

compensation expenses are recognized based on their respective grant-date fair values. Forfeitures are estimated at the time of grant and revised, as necessary, in subsequent periods if actual forfeitures differ from initial estimates. Stock-based compensation expense is recorded net of estimated forfeitures, such that the expense is recorded only for those stock options that are expected to vest.

Recently Adopted And Issued Accounting Pronouncements

Recently Adopted Accounting Pronouncements

The Company adopted the following accounting standards during the three months ended March 31, 2021:

In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract, which requires a customer in a hosting arrangement that is a service contract to follow the internal-use software guidance in Topic 350-40 to determine which implementation costs to capitalize as assets or expense as incurred. The standard is effective January 1, 2021 for emerging growth companies that have adopted the private company relief. The amendments in this ASU can be applied either retrospectively or prospectively to all implementation costs after the date of adoption. The guidance became effective on January 1, 2021 and the Company adopted the standard on a prospective basis. The adoption of the standard did not have a material impact on the Company’s financial statements or related disclosures.

In August 2020, the FASB issued ASU No. 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies accounting for convertible instruments by removing major separation models required under current U.S. GAAP. The standard removes certain settlement conditions that are required for equity contracts to qualify for the derivative scope exception and also simplifies the diluted earnings per share calculation in certain areas The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2021, and interim periods within those fiscal years. The amendment is to be adopted through either a fully retrospective or modified retrospective method of transition. Early adoption is permitted. The Company early adopted ASU 2020-06 on January 1, 2021 with no material impact on the Company’s financial statements or related disclosures.

Recently Issued Accounting Pronouncements

In June 2016, the FASB amended guidance related to impairment of financial instruments as part of ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which will be effective January 1, 2023 for emerging growth companies that have adopted the private company relief. The guidance replaces the incurred loss impairment methodology with an expected credit loss model for which a company recognizes an allowance based on the estimate of expected credit loss. The Company accounts for its loans at fair value through net income, which is outside the scope of Topic 326. For available for sale debt

securities, the guidance will require recognition of expected credit losses by recognizing an allowance for credit losses when the fair value of the security is below amortized cost and the recognition of this allowance is limited to the difference between the security’s amortized cost basis and fair value. The Company is evaluating the impact this ASU will have on its condensed consolidated balance sheets, condensed consolidated statements of operations and comprehensive income, condensed consolidated statements of cash flows and related disclosures. The Company plans to adopt Topic 326 effective as of January 1, 2023.

In March 2020 the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting followed by and ASU 2021-01, Reference Rate Reform, Scope issued in January 2021. ASU 2020-04 and ASU 2021-01 provide temporary optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions that reference the London Interbank Offered Rate or another reference rate expected to be discontinued because of reference rate reform, if certain criteria are met. The guidance in ASU 2020-04 and ASU 2021-01 was effective upon issuance and, once adopted, may be applied prospectively to contract modifications and hedging relationships through December 31, 2022. The Company is currently evaluating the impact of the adoption of ASU 2020-04 and ASU 2021-01 on its condensed consolidated financial statements and related disclosures.