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The Company and Significant Accounting Policies - Concentrations of Credit Risk and Trade Receivables - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) AdvertisingCustomer Advertiser	Mar. 31, 2024 USD ($) AdvertisingCustomer	Dec. 31, 2024 Advertiser
Accounting Policies [Line Items]
Number of advertisers represent more than five percent of trade receivables | Advertiser	0		0
Number of advertising customer represented more than five percent of revenue | AdvertisingCustomer	0	0
Estimated losses for bad debts	$ 0.2	$ (0.2)
Bad debts actually charged off	$ 0.1
Customer Concentration Risk | Revenue | Largest Advertisers
Accounting Policies [Line Items]
Concentration risk percentage	6.00%

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Accounting policies.

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Number of advertisers represent more than five percent of trade receivables.

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Number of advertising customer represented more than five percent of revenue.

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- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

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-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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