Guarantees, Commitments and Contingencies	6 Months Ended
Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Guarantees, Commitments and Contingencies	5. Guarantees, Commitments and Contingencies The Company provides certain guarantees to Sellers in the Marketplace in the ordinary course of business, which are accounted for under ASC 460 as a general guarantee. Vehicle Condition Guarantees—Sellers must attach a vehicle condition report in the Marketplace for every auction; this vehicle condition report is used by Buyers to inform bid decisions. The Company offers guarantees to Sellers in qualifying situations where the Company performed a vehicle inspection and prepared the vehicle condition report. Sellers must pay an additional fee in exchange for this guarantee. The guarantee provides Sellers protection from paying remedies to Buyers related to a Buyer’s claim that the vehicle condition report did not accurately portray the condition of the vehicle purchased on the Marketplace. The guarantee provides the Company with the right to retain proceeds from the subsequent liquidation of the vehicle covered under the guarantee. The guarantee is typically provided for 10 days excluding Sundays after the successful sale of the vehicle on the Marketplace. The fair value of vehicle condition guarantees issued is estimated based on historical results and other qualitative factors. The vehicle condition guarantee revenue is recognized on the earlier of the guarantee expiration date or the guarantee settlement date. The maximum potential payment is the sale price of the vehicle. The total sale price of vehicles for which there was an outstanding guarantee was $273.8 million and $257.6 million at June 30, 2022 and December 31, 2021, respectively. The carrying amount of the liability presented in Accrued other liabilities was $2.0 million and $1.2 million at June 30, 2022 and December 31, 2021, respectively. The recognized probable loss contingency, in excess of vehicle condition guarantees recognized, presented in Accrued other liabilities was $1.1 million and $1.0 million at June 30, 2022 and December 31, 2021, respectively. Other Price Guarantees—The Company provides Sellers with a price guarantee for vehicles to be sold on the Marketplace from time to time. If a vehicle sells below the guaranteed price, the Company is responsible for paying the Seller the difference between the guaranteed price and the final sale price. The term of the guarantee is typically less than one week. No material unsettled price guarantees existed at June 30, 2022 and December 31, 2021. Litigation—The Company and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings and matters in which claims for monetary damages are asserted. On an on-going basis management, after consultation with legal counsel, assesses the Company's liabilities and contingencies in connection with such proceedings. For those matters for where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent pending or threatened litigation could result in exposure in excess of the recorded liability, the amount of such excess is not currently estimable. On March 19, 2021, a putative class action was filed against ACV Auctions Inc., et al. in the U.S. District Court for the Western District of New York, alleging violations of the federal antitrust laws and New York State law related to an alleged conspiracy to set bids on the Company's Marketplace from transactions that originated from one seller. The complaint seeks statutory damages under such laws and other relief. In January 2022, the Court heard arguments on the motion to dismiss that the defendant had previously filed and dismissed the federal claims with leave for the plaintiff to amend their complaint. As of the end of June 2022, the Court is considering the defendants' motion to dismiss the third amended complaint. The Company intends to vigorously defend itself in this case. Due to the inherent uncertainties of litigation, the Company cannot accurately predict the ultimate outcome and cannot estimate the potential loss at this time. However, the Company believes that the resolution of this matter will not have a material adverse effect on its consolidated financial position.

Guarantees, Commitments and Contingencies

6 Months Ended

Jun. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

Guarantees, Commitments and Contingencies

5. Guarantees, Commitments and Contingencies

The Company provides certain guarantees to Sellers in the Marketplace in the ordinary course of business, which are accounted for under ASC 460 as a general guarantee.

Vehicle Condition Guarantees—Sellers must attach a vehicle condition report in the Marketplace for every auction; this vehicle condition report is used by Buyers to inform bid decisions. The Company offers guarantees to Sellers in qualifying situations where the Company performed a vehicle inspection and prepared the vehicle condition report. Sellers must pay an additional fee in exchange for this guarantee. The guarantee provides Sellers protection from paying remedies to Buyers related to a Buyer’s claim that the vehicle condition report did not accurately portray the condition of the vehicle purchased on the Marketplace. The guarantee provides the Company with the right to retain proceeds from the subsequent liquidation of the vehicle covered under the guarantee. The guarantee is typically provided for 10 days excluding Sundays after the successful sale of the vehicle on the Marketplace. The fair value of vehicle condition guarantees issued is estimated based on historical results and other qualitative factors. The vehicle condition guarantee revenue is recognized on the earlier of the guarantee expiration date or the guarantee settlement date. The maximum potential payment is the sale price of the vehicle. The total sale price of vehicles for which there was an outstanding guarantee was $273.8 million and $257.6 million at June 30, 2022 and December 31, 2021, respectively. The carrying amount of the liability presented in Accrued other liabilities was $2.0 million and $1.2 million at June 30, 2022 and December 31, 2021, respectively.

The recognized probable loss contingency, in excess of vehicle condition guarantees recognized, presented in Accrued other liabilities was $1.1 million and $1.0 million at June 30, 2022 and December 31, 2021, respectively.

Other Price Guarantees—The Company provides Sellers with a price guarantee for vehicles to be sold on the Marketplace from time to time. If a vehicle sells below the guaranteed price, the Company is responsible for paying the Seller the difference between the guaranteed price and the final sale price. The term of the guarantee is typically less than one week. No material unsettled price guarantees existed at June 30, 2022 and December 31, 2021.

Litigation—The Company and its subsidiaries are subject in the normal course of business to various pending and threatened legal proceedings and matters in which claims for monetary damages are asserted. On an on-going basis management, after consultation with legal counsel, assesses the Company's liabilities and contingencies in connection with such proceedings. For those matters for where it is probable that the Company will incur losses and the amounts of the losses can be reasonably estimated, the Company records an expense and corresponding liability in its consolidated financial statements. To the extent pending or threatened litigation could result in exposure in excess of the recorded liability, the amount of such excess is not currently estimable.

On March 19, 2021, a putative class action was filed against ACV Auctions Inc., et al. in the U.S. District Court for the Western District of New York, alleging violations of the federal antitrust laws and New York State law related to an alleged conspiracy to set bids on the Company's Marketplace from transactions that originated from one seller. The complaint seeks statutory damages under such laws and other relief. In January 2022, the Court heard arguments on the motion to dismiss that the defendant had previously filed and dismissed the federal claims with leave for the plaintiff to amend their complaint. As of the end of June 2022, the Court is considering the defendants' motion to dismiss the third amended complaint. The Company intends to vigorously defend itself in this case. Due to the inherent uncertainties of litigation, the Company cannot accurately predict the ultimate outcome and cannot estimate the potential loss at this time. However, the Company believes that the resolution of this matter will not have a material adverse effect on its consolidated financial position.