Description of Business and Basis of Presentation (Policies)	9 Months Ended
Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements as of September 30, 2021 and for the three and nine months ended September 30, 2021 and 2020 are unaudited. In the opinion of management, the unaudited condensed consolidated financial statements have been prepared on the same basis as the annual financial statements and reflect all adjustments, which include only normal recurring adjustments, necessary to present fairly the consolidated financial position of LivePerson as of September 30, 2021, and the consolidated results of operations, comprehensive loss, and cash flows for the interim periods ended September 30, 2021 and 2020. The financial data and other information disclosed in these notes to the condensed consolidated financial statements related to these periods are unaudited. The results of operations for any interim period are not necessarily indicative of the results of operations for any other future interim period or for a full fiscal year. The condensed consolidated balance sheet as of December 31, 2020 has been derived from audited consolidated financial statements at that date. Certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). These unaudited interim condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto for the year ended December 31, 2020 included in the Company’s Annual Report on Form 10-K filed with the SEC on March 8, 2021.
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.
Use of Estimates	Use of Estimates The preparation of the Company’s condensed consolidated financial statements in conformity with 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 condensed consolidated financial statements and the reported amounts of income and expenses during the reporting period. These estimates are based on information available as of the date of the condensed consolidated financial statements; therefore, actual results could differ from management’s estimates. Many of the Company’s estimates require increased judgment due to the significant volatility, uncertainty and economic disruption of the COVID-19 pandemic. The Company continues to monitor the effects of the COVID-19 pandemic, and its estimates and judgments may change materially as new events occur or additional information becomes available.
Foreign Currency Transactions and Translations Policy	Foreign Currency Translation The Company’s operations are conducted in various countries around the world and the financial statements of its foreign subsidiaries are reported in the applicable foreign currencies (functional currencies). Financial information is translated from the applicable functional currency to the U.S. dollar (the reporting currency) for inclusion in the Company’s consolidated financial statements. Income, expenses, and cash flows are translated at weighted average exchange rates prevailing during the fiscal period, and assets and liabilities are translated at fiscal period-end exchange rates. Resulting translation adjustments are included as a component of Accumulated other comprehensive income (loss) in stockholders’ equity. Foreign exchange transaction gain or losses are included in Other income (expense), net in the accompanying consolidated statements of operations.
Recently Issued Accounting Standards and Recently Adopted Accounting Pronouncements	Recently Issued Accounting Standards Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity. In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-06 which simplifies the accounting for convertible instruments by eliminating existing accounting models that require separation of a cash conversion or beneficial conversion feature from the host contract. Accordingly, a convertible debt instrument will be accounted as a single liability measured at its amortized cost and a convertible preferred stock will be accounted as a single equity instrument measured at its historical cost, as long as no other embedded features require bifurcation as derivatives and the convertible debt was not issued at a substantial premium. The ASU also simplifies the derivative scope exception for accounting for contracts in an entity’s own equity by: •removing certain conditions required to meet the settlement criterion •clarifying that instruments that are not indexed to the issuer’s own stock must be remeasured at fair value through earnings at each reporting period •clarifying the scope of reassessment guidance and disclosure requirements in Subtopic 815-40. The ASU also makes targeted improvements to the disclosure requirements for convertible instruments and earnings-per-share guidance. For SEC filers, excluding smaller reporting companies, the ASU is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. The ASU specifies that the guidance should be adopted as of the beginning of the annual fiscal year. The Company is assessing what impact ASU 2020-06 will have on its condensed consolidated financial statements. Recently Adopted Accounting Pronouncements Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. In December 2019, the FASB issued ASU 2019-12, which is intended to simplify the accounting for income taxes by removing certain exceptions and by updating accounting requirements around franchise taxes, goodwill recognized for tax purposes, the allocation of current and deferred tax expenses among legal entities, among other minor changes. The ASU is effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. Early adoption is permitted. The Company adopted ASU 2019-12 in the first quarter of 2021 and determined that the ASU had no material impact on its condensed consolidated financial statements.

Description of Business and Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2021

The accompanying condensed consolidated financial statements as of September 30, 2021 and for the three and nine months ended September 30, 2021 and 2020 are unaudited. In the opinion of management, the unaudited condensed consolidated financial statements have been prepared on the same basis as the annual financial statements and reflect all adjustments, which include only normal recurring adjustments, necessary to present fairly the consolidated financial position of LivePerson as of September 30, 2021, and the consolidated results of operations, comprehensive loss, and cash flows for the interim periods ended September 30, 2021 and 2020. The financial data and other information disclosed in these notes to the condensed consolidated financial statements related to these periods are unaudited. The results of operations for any interim period are not necessarily indicative of the results of operations for any other future interim period or for a full fiscal year. The condensed consolidated balance sheet as of December 31, 2020 has been derived from audited consolidated financial statements at that date.

Certain information and note disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). These unaudited interim condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto for the year ended December 31, 2020 included in the Company’s Annual Report on Form 10-K filed with the SEC on March 8, 2021.

Principles of Consolidation

The condensed consolidated financial statements include the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.

Use of Estimates

The preparation of the Company’s condensed consolidated financial statements in conformity with 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 condensed consolidated financial statements and the reported amounts of income and expenses during the reporting period. These estimates are based on information available as of the date of the condensed consolidated financial statements; therefore, actual results could differ from management’s estimates.

Many of the Company’s estimates require increased judgment due to the significant volatility, uncertainty and economic disruption of the COVID-19 pandemic. The Company continues to monitor the effects of the COVID-19 pandemic, and its estimates and judgments may change materially as new events occur or additional information becomes available.

Foreign Currency Transactions and Translations Policy

Foreign Currency Translation

The Company’s operations are conducted in various countries around the world and the financial statements of its foreign subsidiaries are reported in the applicable foreign currencies (functional currencies). Financial information is translated from the applicable functional currency to the U.S. dollar (the reporting currency) for inclusion in the Company’s consolidated financial statements. Income, expenses, and cash flows are translated at weighted average exchange rates prevailing during the fiscal period, and assets and liabilities are translated at fiscal period-end exchange rates. Resulting translation adjustments are included as a component of Accumulated other comprehensive income (loss) in stockholders’ equity. Foreign exchange transaction gain or losses are included in Other income (expense), net in the accompanying consolidated statements of operations.

Recently Issued Accounting Standards and Recently Adopted Accounting Pronouncements

Recently Issued Accounting Standards

Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity. In August 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-06 which simplifies the accounting for convertible instruments by eliminating existing accounting models that require separation of a cash conversion or beneficial conversion feature from the host contract. Accordingly, a convertible debt instrument will be accounted as a single liability measured at its amortized cost and a convertible preferred stock will be accounted as a single equity instrument measured at its historical cost, as long as no other embedded features require bifurcation as derivatives and

the convertible debt was not issued at a substantial premium. The ASU also simplifies the derivative scope exception for accounting for contracts in an entity’s own equity by:

•removing certain conditions required to meet the settlement criterion

•clarifying that instruments that are not indexed to the issuer’s own stock must be remeasured at fair value through earnings at each reporting period

•clarifying the scope of reassessment guidance and disclosure requirements in Subtopic 815-40.

The ASU also makes targeted improvements to the disclosure requirements for convertible instruments and earnings-per-share guidance.

For SEC filers, excluding smaller reporting companies, the ASU is effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. The ASU specifies that the guidance should be adopted as of the beginning of the annual fiscal year. The Company is assessing what impact ASU 2020-06 will have on its condensed consolidated financial statements.

Recently Adopted Accounting Pronouncements

Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. In December 2019, the FASB issued ASU 2019-12, which is intended to simplify the accounting for income taxes by removing certain exceptions and by updating accounting requirements around franchise taxes, goodwill recognized for tax purposes, the allocation of current and deferred tax expenses among legal entities, among other minor changes. The ASU is effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. Early adoption is permitted. The Company adopted ASU 2019-12 in the first quarter of 2021 and determined that the ASU had no material impact on its condensed consolidated financial statements.