Basis of Presentation (Policies)	9 Months Ended
Sep. 30, 2020
Accounting Policies [Abstract]
Principles of Consolidation	Principles of consolidation—The accompanying condensed consolidated financial statements include the accounts of the Holding Company and the accounts of all subsidiaries in which the Holding Company has a controlling interest and the consolidated accounts of variable interest entities (“VIEs”) in which the Holding Company is deemed to be the primary beneficiary. All intercompany transactions and balances have been eliminated in consolidation.
Unaudited Interim Financial Information	Unaudited interim financial information—The accompanying condensed consolidated financial statements are unaudited and have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. These condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. In the opinion of management, all adjustments (including normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the nine months ended September 30, 2020 are not necessarily indicative of the results that may be expected for the full year.
Use of Estimates	Use of estimates—The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Management evaluates its estimates on an ongoing basis and makes revisions to these estimates and related disclosures as experience develops or new information becomes known. Actual results could differ from those estimates.The efforts that have been implemented at the national, state and local levels to combat and mitigate a rapid spread of a global coronavirus (COVID-19) pandemic have severely impacted daily activities and the economies of California and the United States. While the Company is closely monitoring government guidelines and developments in the response to the COVID-19 outbreak, the extent to which COVID-19 impacts the Company’s results will depend on future developments, including the extent and duration of precautionary measures to slow the outbreak and impacts on employment and other economic conditions affecting the Company’s business. Due to the uncertainties associated with COVID-19, the Company’s estimates of the impacts to its future results of operations, financial condition or cash flows may materially change.
Recent Accounting Pronouncements	Recently adopted accounting pronouncements—In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU No. 2016-13”) which amends the guidance on the impairment of financial instruments, including most debt instruments, trade receivables, contract assets, and loans. ASU No. 2016-13 adds to U.S. GAAP an impairment model known as the current expected credit loss model, or CECL, that is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of expected credit losses for instruments measured at amortized cost, resulting in a net presentation of the amount expected to be collected on the financial asset. The Company and its unconsolidated entities adopted ASU No. 2016-13 on January 1, 2020 using a modified retrospective approach with no material impact on the Company’s consolidated financial statements.Under the new guidance, the Company performs a credit loss assessment for new financial assets obtained on a pooling basis by financial asset type (i.e. contract assets, trade receivables, investments, etc.) and estimates an allowance of expected credit loss. Factors considered in the estimation of expected credit loss include, but are not limited to, historical loss experience, third-party default rates on similar financial assets, credit-rating agency ratings and qualitative macroeconomic conditions. The Company continually monitors its credit loss exposure by evaluating changes in economic conditions or significant events and how that may impact current credit loss estimates. At September 30, 2020, there was no material allowance for credit loss.

Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2020

Principles of consolidation—The accompanying condensed consolidated financial statements include the accounts of the Holding Company and the accounts of all subsidiaries in which the Holding Company has a controlling interest and the consolidated accounts of variable interest entities (“VIEs”) in which the Holding Company is deemed to be the primary beneficiary. All intercompany transactions and balances have been eliminated in consolidation.

Unaudited Interim Financial Information

Unaudited interim financial information—The accompanying condensed consolidated financial statements are unaudited and have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. These condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. In the opinion of management, all adjustments (including normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the nine months ended September 30, 2020 are not necessarily indicative of the results that may be expected for the full year.

Use of Estimates

Use of estimates—The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Management evaluates its estimates on an ongoing basis and makes revisions to these estimates and related disclosures as experience develops or new information becomes known. Actual results could differ from those estimates.The efforts that have been implemented at the national, state and local levels to combat and mitigate a rapid spread of a global coronavirus (COVID-19) pandemic have severely impacted daily activities and the economies of California and the United States. While the Company is closely monitoring government guidelines and developments in the response to the COVID-19 outbreak, the extent to which COVID-19 impacts the Company’s results will depend on future developments, including the extent and duration of precautionary measures to slow the outbreak and impacts on employment and other economic conditions affecting the Company’s business. Due to the uncertainties associated with COVID-19, the Company’s estimates of the impacts to its future results of operations, financial condition or cash flows may materially change.

Recent Accounting Pronouncements

Recently adopted accounting pronouncements—In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU No. 2016-13”) which amends the guidance on the impairment of financial instruments, including most debt instruments, trade receivables, contract assets, and loans. ASU No. 2016-13 adds to U.S. GAAP an impairment model known as the current expected credit loss model, or CECL, that is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of expected credit losses for instruments measured at amortized cost, resulting in a net presentation of the amount expected to be collected on the financial asset. The Company and its unconsolidated entities adopted ASU No. 2016-13 on January 1, 2020 using a modified retrospective approach with no material impact on the Company’s consolidated financial statements.Under the new guidance, the Company performs a credit loss assessment for new financial assets obtained on a pooling basis by financial asset type (i.e. contract assets, trade receivables, investments, etc.) and estimates an allowance of expected credit loss. Factors considered in the estimation of expected credit loss include, but are not limited to, historical loss experience, third-party default rates on similar financial assets, credit-rating agency ratings and qualitative macroeconomic conditions. The Company continually monitors its credit loss exposure by evaluating changes in economic conditions or significant events and how that may impact current credit loss estimates. At September 30, 2020, there was no material allowance for credit loss.