Commitments and Contingencies	9 Months Ended
Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. Commitments and Contingencies Contractual Obligations and Commitments All of the Company’s property, equipment, and internal-use software have been purchased with cash with the exception of amounts related to unpaid property and equipment and internal use software and amounts related to obligations under finance leases as disclosed in the Unaudited Condensed Consolidated Statements of Cash Flows as of September 30, 2021. The Company has no material long-term purchase obligations outstanding with any vendor or third party. Leases The Company’s primary operating lease obligations consist of various leases for office space in: Boston, Massachusetts; Cambridge, Massachusetts; San Francisco, California; Addison, Texas; Plano, Texas; and Dublin, Ireland. The Company also has an operating lease obligation for data center space in Needham, Massachusetts. As of September 30, 2021, there were no material changes in the Company’s leases from those disclosed in the Annual Report, other than as discussed below. On January 25, 2021, CarOffer entered into a sublease in Addison, Texas at 15601 Dallas Parkway for the lease of approximately 61,826 square feet of office space with a non-cancellable lease term through 2030. The sublease commenced on March 1, 2021. CarOffer’s monthly base rent for the premises, which is payable from January 1, 2022, will initially be approximately $152, and will increase each year up to a maximum monthly base rent of approximately $185. In connection with the sublease, CarOffer entered into a financing lease arrangement for furniture and fixtures used in connection with its operations. The term of the financing lease is for the entire period of the sublease. The monthly rent for the furniture and fixtures is included in the sublease monthly rent, with ownership of the furniture and fixtures transferring to CarOffer at the expiration of the lease term. Monthly rent payments are allocated based upon the relative fair value of the office space and furniture of 95% and 5%, respectively. Upon commencement, the right of use asset for the office space and furniture was $12,336 and $664, respectively. On July 1, 2019, CarOffer entered into a sublease in Plano, Texas at 2701 East Plano Parkway for the lease of approximately 26,971 square feet of office space with a non-cancellable lease term through 2023. The sublease commenced on July 1, 2019. CarOffer’s monthly base rent for the premises, which is payable from July 1, 2019, was initially approximately $21, and will increase each year up to maximum monthly base rent of $22. The Company acquired the lease as part of the CarOffer Acquisition. The Company’s leases in Boston, Massachusetts, Cambridge, Massachusetts and San Francisco, California have associated letters of credit, which are recorded as restricted cash within the Unaudited Condensed Consolidated Balance Sheet. At September 30, 2021 and December 31, 2020, restricted cash was $16,130 and $10,627, respectively, and primarily related to cash held at a financial institution in an interest‑bearing cash account as collateral for the letters of credit related to the contractual provisions for the Company’s building leases. Restricted cash at September 30, 2021 also includes pass-through payments from customers related to the Company’s wholesale business. At September 30, 2021 and December 31, 2020, portions of restricted cash were classified as a short-term asset and long‑term asset, as disclosed on the Unaudited Condensed Consolidated Balance Sheet. Acquisitions On January 14, 2021, the Company completed the CarOffer Acquisition, details of which are described in Note 4 of the Unaudited Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report. Legal Matters From time to time the Company may become involved in legal proceedings or be subject to claims arising in the ordinary course of its business. The Company is not presently subject to any pending or threatened litigation that it believes, if determined adversely to the Company, individually, or taken together, would reasonably be expected to have a material adverse effect on its business or financial results. Guarantees and Indemnification Obligations In the ordinary course of business, the Company enters into agreements with its customers, partners and service providers that include commercial provisions with respect to licensing, infringement, indemnification, and other common provisions. The Company does not, in the ordinary course, agree to guaranty or indemnification obligations for the Company under its contracts with customers. Based on historical experience and information known at September 30, 2021 and December 31, 2020, the Company has not incurred any costs for guarantees or indemnities.

Commitments and Contingencies

9 Months Ended

Sep. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

9. Commitments and Contingencies

Contractual Obligations and Commitments

All of the Company’s property, equipment, and internal-use software have been purchased with cash with the exception of amounts related to unpaid property and equipment and internal use software and amounts related to obligations under finance leases as disclosed in the Unaudited Condensed Consolidated Statements of Cash Flows as of September 30, 2021. The Company has no material long-term purchase obligations outstanding with any vendor or third party.

Leases

The Company’s primary operating lease obligations consist of various leases for office space in: Boston, Massachusetts; Cambridge, Massachusetts; San Francisco, California; Addison, Texas; Plano, Texas; and Dublin, Ireland. The Company also has an operating lease obligation for data center space in Needham, Massachusetts.

As of September 30, 2021, there were no material changes in the Company’s leases from those disclosed in the Annual Report, other than as discussed below.

On January 25, 2021, CarOffer entered into a sublease in Addison, Texas at 15601 Dallas Parkway for the lease of approximately 61,826 square feet of office space with a non-cancellable lease term through 2030. The sublease commenced on March 1, 2021. CarOffer’s monthly base rent for the premises, which is payable from January 1, 2022, will initially be approximately $152, and will increase each year up to a maximum monthly base rent of approximately $185. In connection with the sublease, CarOffer entered into a financing lease arrangement for furniture and fixtures used in connection with its operations. The term of the financing lease is for the entire period of the sublease. The monthly rent for the furniture and fixtures is included in the sublease monthly rent, with ownership of the furniture and fixtures transferring to CarOffer at the expiration of the lease term. Monthly rent payments are allocated based upon the relative fair value of the office space and furniture of 95% and 5%, respectively. Upon commencement, the right of use asset for the office space and furniture was $12,336 and $664, respectively.

On July 1, 2019, CarOffer entered into a sublease in Plano, Texas at 2701 East Plano Parkway for the lease of approximately 26,971 square feet of office space with a non-cancellable lease term through 2023. The sublease commenced on July 1, 2019. CarOffer’s monthly base rent for the premises, which is payable from July 1, 2019, was initially approximately $21, and will increase each year up to maximum monthly base rent of $22. The Company acquired the lease as part of the CarOffer Acquisition.

The Company’s leases in Boston, Massachusetts, Cambridge, Massachusetts and San Francisco, California have associated letters of credit, which are recorded as restricted cash within the Unaudited Condensed Consolidated Balance Sheet. At September 30, 2021 and December 31, 2020, restricted cash was $16,130 and $10,627, respectively, and primarily related to cash held at a financial institution in an interest‑bearing cash account as collateral for the letters of credit related to the contractual provisions for the Company’s building leases. Restricted cash at September 30, 2021 also includes pass-through payments from customers related to the Company’s wholesale business. At September 30, 2021 and December 31, 2020, portions of restricted cash were classified as a short-term asset and long‑term asset, as disclosed on the Unaudited Condensed Consolidated Balance Sheet.

Acquisitions

On January 14, 2021, the Company completed the CarOffer Acquisition, details of which are described in Note 4 of the Unaudited Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report.

Legal Matters

From time to time the Company may become involved in legal proceedings or be subject to claims arising in the ordinary course of its business. The Company is not presently subject to any pending or threatened litigation that it believes, if determined adversely to the Company, individually, or taken together, would reasonably be expected to have a material adverse effect on its business or financial results.

Guarantees and Indemnification Obligations

In the ordinary course of business, the Company enters into agreements with its customers, partners and service providers that include commercial provisions with respect to licensing, infringement, indemnification, and other common provisions. The Company does not, in the ordinary course, agree to guaranty or indemnification obligations for the Company under its contracts with customers. Based on historical experience and information known at September 30, 2021 and December 31, 2020, the Company has not incurred any costs for guarantees or indemnities.