v3.25.4
Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
Segment
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Corporation formation date Apr. 26, 2013    
Insurance litigation settlement proceeds relating to event cancellation   $ 1.5 $ 2.8
Amounts receivable from credit card processors $ 2.8 0.5  
Contingent consideration 75.1 10.7  
Contingent consideration 12.2    
Current deferred revenues 219.2 190.5  
Accounts receivable $ 76.0 57.5  
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] srt:ChiefExecutiveOfficerMember    
Advertising and marketing costs $ 9.5 8.6 9.6
Vesting period 10 years    
Barter Transactions [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Revenues recognized $ 26.0 18.8 7.0
Cost of revenues $ 26.0 $ 18.8 $ 7.0
Chief Operating Decision Maker [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Number of operating segment | Segment 3    
Number of reportable segments | Segment 1    
Number of additional operating segments that do not meet quantitative thresholds for reporting segment | Segment 2    
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Content [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Concentration risk, percentage 4.00% 6.00% 6.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Commerce [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Concentration risk, percentage 5.00% 5.00% 5.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Trade Show and Other Events [Member] | Connections [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Concentration risk, percentage 91.00% 89.00% 89.00%
Leasehold Improvements [Member] | Minimum [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Property and equipment , estimated useful life 1 year    
Leasehold Improvements [Member] | Maximum [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Property and equipment , estimated useful life 10 years    
Equipment [Member] | Minimum [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Property and equipment , estimated useful life 1 year    
Equipment [Member] | Maximum [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Property and equipment , estimated useful life 10 years    
Money Market Mutual Funds [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Cash and cash equivalents $ 4.1 $ 163.7  
Contingent Consideration [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Contingent consideration 12.2 0.7  
Other Noncurrent Liabilities [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Contingent consideration $ 62.9 $ 10.0  
Redeemable Convertible Preferred Stock [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Right to redeem preferred stock threshold period 6 years    
Redeemable Convertible Preferred Stock [Member] | Onex Partners V LP [Member] | Initial Private Placement [Member]      
Description Of Business And Summary Of Significant Accounting Policies [Line Items]      
Preferred stock accretion rate per annum 7.00%