Related Party Transactions	9 Months Ended
	Sep. 30, 2023
Related Party Transactions [Abstract]
Related Party Transactions	Related Party TransactionsThe Company recognized revenue from NBCUniversal Media, LLC (“NBCU”) of $1.9 million and $1.2 million for the three months ended September 30, 2023 and 2022, respectively, and $2.6 million and $3.3 million for the nine months ended September 30, 2023 and 2022, respectively. The Company recognized expenses under contractual obligations from NBCU of $nil and $0.2 million for the three months ended September 30, 2023 and 2022, respectively, and $nil and $0.6 million for the nine months ended September 30, 2023 and 2022, respectively. The Company had outstanding receivable balances of $2.0 million and $2.2 million from NBCU as of September 30, 2023 and December 31, 2022, respectively. The Company had an outstanding payable balance of $0.2 million to NBCU as of September 30, 2023 (none as of December 31, 2022).On March 15, 2023, Verizon Ventures LLC (“Verizon”) converted all 6,478,031 shares of Class C common stock into Class A common stock, resulting in Verizon and its affiliates holding more than 5% of our Class A common stock. Verizon is the landlord for the Company’s corporate headquarters (assumed from the Complex Networks Acquisition), and we transact with Verizon in the normal course of business, such as with agency advertising deals and for certain utilities. The Company recognized revenue from Verizon of $nil for both the three and nine months ended September 30, 2023 and 2022. The Company recognized expenses under contractual obligations from Verizon of $1.5 million for both the three months ended September 30, 2023 and 2022, and $4.5 million for both the nine months ended September 30, 2023 and 2022. The Company had no outstanding receivables or payables from or to Verizon as of September 30, 2023 or December 31, 2022.