Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2017
Accounting Policies [Abstract]
Summary of significant accounting policies	Summary of Significant Accounting Policies Basis of Presentation The Company’s unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and Article 10-1 of Regulation S-X. Accordingly, some information and footnote disclosures required by GAAP for complete financial statements have been condensed or omitted pursuant to such rules and regulations. In the opinion of the Company’s management, the accompanying unaudited condensed consolidated financial statements and notes have been prepared on the same basis as the audited consolidated financial statements for the year ended December 31, 2016 and include all adjustments (consisting of normal recurring adjustments) necessary for a fair statement of the interim periods presented. The condensed consolidated balance sheet at December 31, 2016 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Form 10-K filed with the SEC on March 1, 2017. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Assets and liabilities which are subject to judgment and use of estimates include sales allowances and allowances for doubtful accounts, the fair value of assets and liabilities assumed in business combinations, fair value of the capitalized facility leases, the recoverability of goodwill and long-lived assets, valuation allowances with respect to deferred tax assets, useful lives associated with property and equipment and intangible assets, lease exit liabilities, contingencies, and the valuation and assumptions underlying stock-based compensation and other equity instruments. On an ongoing basis, the Company evaluates its estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities. In addition, the Company engaged valuation specialists to assist with management’s determination of the valuation of its capitalized facility leases, fair values of assets and liabilities assumed in business combinations, the fair value of reporting units in connection with annual goodwill impairment testing, and in periods prior to the Company’s initial public offering, valuation of common stock. Segments The Company has one operating segment. The Company’s chief operating decision maker (“CODM”) is the President and Chief Executive Officer and the Chief Financial Officer, who manage the Company’s operations based on consolidated financial information for purposes of evaluating financial performance and allocating resources. The CODM review financial information on a consolidated basis, accompanied by information about transaction revenue and forecasts, consulting and other revenue (Note 12). All of the Company’s principal operations, decision-making functions and assets are located in the United States. Recent Accounting Pronouncements Under the Jumpstart Our Business Startups Act (“JOBS Act”), the Company meets the definition of an emerging growth company. The Company has irrevocably elected to opt out of the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act. In May 2017, the Financial Accounting Standards Board (“FASB”) issued guidance amending the existing accounting standard for stock-based awards in order to provide clarity and to reduce both diversity in practice and the cost and complexity of applying the existing guidance as it relates to modifications of stock-based payment awards. The new guidance will be effective for all entities for annual periods beginning after December 15, 2017 and interim periods therein, with early adoption permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements. In January 2017, the FASB issued guidance simplifying the test for goodwill impairment. This standard eliminates Step 2 from the goodwill impairment test, instead requiring an entity to recognize a goodwill impairment charge for the amount by which the goodwill carrying amount exceeds the reporting unit's fair value. This guidance is effective for interim and annual goodwill impairment tests in fiscal years beginning after December 15, 2019, and early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements. In October 2016, the FASB issued new guidance which requires the recognition of the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This removes the exception to postpone recognition until the asset has been sold to an outside party. This standard is effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, with early adoption permitted. It is required to be applied on a modified retrospective basis through a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements. In February 2016, the FASB issued guidance amending the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. The new guidance will be effective for public entities for annual periods beginning after December 15, 2018 and interim periods therein. Early adoption is permitted. The new leases standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. The Company is evaluating the methods and impact of adopting this guidance on its consolidated financial statements. In May 2014, the FASB issued guidance related to revenue from contracts with customers. Under this guidance, revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. The updated standard will replace all existing revenue recognition guidance under GAAP when it becomes effective and permits the use of either the full retrospective or cumulative effect transition method. In August 2015, the FASB deferred the effective date to January 1, 2018, with early adoption beginning January 1, 2017. In 2016, the FASB issued additional guidance to clarify the implementation guidance. The Company plans to adopt this guidance beginning January 1, 2018 using the cumulative effect or “modified retrospective” transition method. The Company continues to evaluate the impact of adopting this guidance on its consolidated financial statements.

Summary of Significant Accounting Policies

Basis of Presentation

The Company’s unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and Article 10-1 of Regulation S-X. Accordingly, some information and footnote disclosures required by GAAP for complete financial statements have been condensed or omitted pursuant to such rules and regulations. In the opinion of the Company’s management, the accompanying unaudited condensed consolidated financial statements and notes have been prepared on the same basis as the audited consolidated financial statements for the year ended December 31, 2016 and include all adjustments (consisting of normal recurring adjustments) necessary for a fair statement of the interim periods presented.

The condensed consolidated balance sheet at December 31, 2016 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s Form 10-K filed with the SEC on March 1, 2017.

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Assets and liabilities which are subject to judgment and use of estimates include sales allowances and allowances for doubtful accounts, the fair value of assets and liabilities assumed in business combinations, fair value of the capitalized facility leases, the recoverability of goodwill and long-lived assets, valuation allowances with respect to deferred tax assets, useful lives associated with property and equipment and intangible assets, lease exit liabilities, contingencies, and the valuation and assumptions underlying stock-based compensation and other equity instruments. On an ongoing basis, the Company evaluates its estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities. In addition, the Company engaged valuation specialists to assist with management’s determination of the valuation of its capitalized facility leases, fair values of assets and liabilities assumed in business combinations, the fair value of reporting units in connection with annual goodwill impairment testing, and in periods prior to the Company’s initial public offering, valuation of common stock.

Segments

The Company has one operating segment. The Company’s chief operating decision maker (“CODM”) is the President and Chief Executive Officer and the Chief Financial Officer, who manage the Company’s operations based on consolidated financial information for purposes of evaluating financial performance and allocating resources.

The CODM review financial information on a consolidated basis, accompanied by information about transaction revenue and forecasts, consulting and other revenue (Note 12). All of the Company’s principal operations, decision-making functions and assets are located in the United States.

Recent Accounting Pronouncements

Under the Jumpstart Our Business Startups Act (“JOBS Act”), the Company meets the definition of an emerging growth company. The Company has irrevocably elected to opt out of the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act.

In May 2017, the Financial Accounting Standards Board (“FASB”) issued guidance amending the existing accounting standard for stock-based awards in order to provide clarity and to reduce both diversity in practice and the cost and complexity of applying the existing guidance as it relates to modifications of stock-based payment awards. The new guidance will be effective for all entities for annual periods beginning after December 15, 2017 and interim periods therein, with early adoption permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

In January 2017, the FASB issued guidance simplifying the test for goodwill impairment. This standard eliminates Step 2 from the goodwill impairment test, instead requiring an entity to recognize a goodwill impairment charge for the amount by which the goodwill carrying amount exceeds the reporting unit's fair value. This guidance is effective for interim and annual goodwill impairment tests in fiscal years beginning after December 15, 2019, and early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

In October 2016, the FASB issued new guidance which requires the recognition of the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This removes the exception to postpone recognition until the asset has been sold to an outside party. This standard is effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods, with early adoption permitted. It is required to be applied on a modified retrospective basis through a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

In February 2016, the FASB issued guidance amending the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. The new guidance will be effective for public entities for annual periods beginning after December 15, 2018 and interim periods therein. Early adoption is permitted. The new leases standard requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. The Company is evaluating the methods and impact of adopting this guidance on its consolidated financial statements.

In May 2014, the FASB issued guidance related to revenue from contracts with customers. Under this guidance, revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. The updated standard will replace all existing revenue recognition guidance under GAAP when it becomes effective and permits the use of either the full retrospective or cumulative effect transition method. In August 2015, the FASB deferred the effective date to January 1, 2018, with early adoption beginning January 1, 2017. In 2016, the FASB issued additional guidance to clarify the implementation guidance. The Company plans to adopt this guidance beginning January 1, 2018 using the cumulative effect or “modified retrospective” transition method. The Company continues to evaluate the impact of adopting this guidance on its consolidated financial statements.