Commitments and Contingencies	6 Months Ended
Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	7. Commitments and Contingencies Contractual Obligations and Commitments As of June 30, 2022, all of the Company’s property, equipment, and externally sourced internal-use software have been purchased with cash with the exception of amounts related to unpaid property and equipment, capitalized website development, capitalized internal-use software and capitalized hosting arrangements and amounts related to obligations under finance leases as disclosed in the Unaudited Condensed Consolidated Statements of Cash Flows. 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; and Dublin, Ireland. The Company also has an operating lease obligation for data center space in Needham, Massachusetts. As of June 30, 2022, there were no material changes in the Company’s leases from those disclosed in the Annual Report. The Company’s leases in Boston, Massachusetts, Cambridge, Massachusetts and San Francisco, California have associated letters of credit, which are recognized within restricted cash in the Unaudited Condensed Consolidated Balance Sheet. As of June 30, 2022 and December 31, 2021, restricted cash was $22,918 and $16,336, 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 and pass-through payments from customers related to the Company’s wholesale business. As of June 30, 2022 and December 31, 2021, 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 acquisition of a 51% interest in CarOffer, an automated instant vehicle trade platform based in Addison, Texas, with the option to acquire portions of the remaining equity in the future. Details of this acquisition are more fully described in Note 4 to the financial statements contained within the Annual Report. On May 6, 2022, the CarOffer Operating Agreement (as defined in Note 4 to the financial statements contained within the Annual Report) was amended with retroactive effect to correct a clerical error in connection with the November 23, 2021 amendment and restatement of the CarOffer Operating Agreement. 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. However, litigation is inherently unpredictable and the future outcome of legal proceedings and other contingencies may be unexpected or differ from the Company’s estimated liabilities, which could have a material adverse effect on the Company’s future 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, guarantees, indemnification, and other common provisions. CarOffer provides certain guarantees to dealers through its 45-Day Guaranteed Bid and OfferGuard product offerings, which are accounted for under ASC Topic 460, Guarantees. 45-Day Guaranteed Bid is an arrangement through which a selling dealer lists a car on the CarOffer platform, and CarOffer provides an offer to purchase the vehicle listed at a specified price at any time over a 45-day period. This provides the seller with a put option, where they have the right, but not the obligation, to require CarOffer to purchase the vehicle during this window. OfferGuard is an arrangement through which a buying dealer purchases a car on the CarOffer platform, and CarOffer provides an offer to purchase the vehicle at a specified price between days 1 and 3, and days 42 and 45 if the dealer is not able to sell the vehicle after 42 days. A guarantee liability is initially measured using the amount of consideration received from the dealer for the purchase of the guarantee. The initial liability is released, and guarantee income is recognized, upon the earliest of the following: the vehicle sells during the guarantee period, the seller exercises it’s put option during the guarantee period, or the option expires unexercised at the end of the guarantee period. Guarantee income is recognized within wholesale revenue in the Unaudited Condensed Consolidated Income Statements. When it is probable and reasonably estimable that CarOffer will incur a loss on a vehicle that it is required to purchase, a liability, and a corresponding charge to cost of sales is recognized for the amount of the loss in the Unaudited Condensed Consolidated Balance Sheets. Gains and losses resulting from the dealers exercise of guarantees are recognized within cost of sales in the Unaudited Condensed Consolidated Balance Sheets. For the three months ended June 30, 2022 and 2021 and for the six months ended June 30, 2022 and 2021, income for guarantees purchased by dealers was $2,292, $1,628, $5,595, and $2,275, respectively. For the three months ended June 30, 2022 and 2021 and for the six months ended June 30, 2022 and 2021, the net loss or gain resulting from the dealer's exercise of guarantees was immaterial. As of June 30, 2022, the maximum potential amount of future payments that CarOffer could be required to make under these guarantees was $100,746. Of the maximum potential amount of future payments, none are considered probable. The exercise of guarantees has historically been infrequent and even when such exercises did occur the losses were immaterial. As such, as of June 30, 2022, CarOffer had no contingent loss liabilities. As of December 31, 2021, the maximum potential amount of future payments that CarOffer could be required to make under these guarantees was $76,075. Of the maximum potential amount of future payments, none are considered probable. The exercise of guarantees has historically been infrequent and even when such exercises did occur, the losses were immaterial. As such, as of December 31, 2021, CarOffer had no contingent loss liabilities.

Commitments and Contingencies

6 Months Ended

Jun. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

7. Commitments and Contingencies

Contractual Obligations and Commitments

As of June 30, 2022, all of the Company’s property, equipment, and externally sourced internal-use software have been purchased with cash with the exception of amounts related to unpaid property and equipment, capitalized website development, capitalized internal-use software and capitalized hosting arrangements and amounts related to obligations under finance leases as disclosed in the Unaudited Condensed Consolidated Statements of Cash Flows. 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; and Dublin, Ireland. The Company also has an operating lease obligation for data center space in Needham, Massachusetts.

As of June 30, 2022, there were no material changes in the Company’s leases from those disclosed in the Annual Report.

The Company’s leases in Boston, Massachusetts, Cambridge, Massachusetts and San Francisco, California have associated letters of credit, which are recognized within restricted cash in the Unaudited Condensed Consolidated Balance Sheet. As of June 30, 2022 and December 31, 2021, restricted cash was $22,918 and $16,336, 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 and pass-through payments from customers related to the Company’s wholesale business. As of June 30, 2022 and December 31, 2021, 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 acquisition of a 51% interest in CarOffer, an automated instant vehicle trade platform based in Addison, Texas, with the option to acquire portions of the remaining equity in the future. Details of this acquisition are more fully described in Note 4 to the financial statements contained within the Annual Report. On May 6, 2022, the CarOffer Operating Agreement (as defined in Note 4 to the financial statements contained within the Annual Report) was amended with retroactive effect to correct a clerical error in connection with the November 23, 2021 amendment and restatement of the CarOffer Operating Agreement.

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. However, litigation is inherently unpredictable and the future outcome of legal proceedings and other contingencies may be unexpected or differ from the Company’s estimated liabilities, which could have a material adverse effect on the Company’s future 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, guarantees, indemnification, and other common provisions.

CarOffer provides certain guarantees to dealers through its 45-Day Guaranteed Bid and OfferGuard product offerings, which are accounted for under ASC Topic 460, Guarantees.

45-Day Guaranteed Bid is an arrangement through which a selling dealer lists a car on the CarOffer platform, and CarOffer provides an offer to purchase the vehicle listed at a specified price at any time over a 45-day period. This provides the seller with a put option, where they have the right, but not the obligation, to require CarOffer to purchase the vehicle during this window. OfferGuard is an arrangement through which a buying dealer purchases a car on the CarOffer platform, and CarOffer provides an offer to purchase the vehicle at a specified price between days 1 and 3, and days 42 and 45 if the dealer is not able to sell the vehicle after 42 days.

A guarantee liability is initially measured using the amount of consideration received from the dealer for the purchase of the guarantee. The initial liability is released, and guarantee income is recognized, upon the earliest of the following: the vehicle sells during the guarantee period, the seller exercises it’s put option during the guarantee period, or the option expires unexercised at the end of the guarantee period. Guarantee income is recognized within wholesale revenue in the Unaudited Condensed Consolidated Income Statements. When it is probable and reasonably estimable that CarOffer will incur a loss on a vehicle that it is required to purchase, a liability, and a corresponding charge to cost of sales is recognized for the amount of the loss in the Unaudited Condensed Consolidated Balance Sheets. Gains and losses resulting from the dealers exercise of guarantees are recognized within cost of sales in the Unaudited Condensed Consolidated Balance Sheets.

For the three months ended June 30, 2022 and 2021 and for the six months ended June 30, 2022 and 2021, income for guarantees purchased by dealers was $2,292, $1,628, $5,595, and $2,275, respectively. For the three months ended June 30, 2022 and 2021 and for the six months ended June 30, 2022 and 2021, the net loss or gain resulting from the dealer's exercise of guarantees was immaterial.

As of June 30, 2022, the maximum potential amount of future payments that CarOffer could be required to make under these guarantees was $100,746. Of the maximum potential amount of future payments, none are considered probable. The exercise of guarantees has historically been infrequent and even when such exercises did occur the losses were immaterial. As such, as of June 30, 2022, CarOffer had no contingent loss liabilities.

As of December 31, 2021, the maximum potential amount of future payments that CarOffer could be required to make under these guarantees was $76,075. Of the maximum potential amount of future payments, none are considered probable. The exercise of guarantees has historically been infrequent and even when such exercises did occur, the losses were immaterial. As such, as of December 31, 2021, CarOffer had no contingent loss liabilities.