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Organization, Description of Business and Summary of Significant Accounting Policies - Narrative (Details)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended
Feb. 03, 2025
USD ($)
shares
Mar. 31, 2026
USD ($)
segment
$ / shares
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
$ / shares
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Common stock, par value (in usd per share) | $ / shares   $ 0.001   $ 0.001
Number of operating segments | segment   1    
Number of reportable segments | segment   1    
Net pension liabilities   $ 7.1   $ 7.0
Net periodic benefit cost   $ 0.2 $ 0.2  
Outbrain Inc | Altice        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Merger and acquisition costs     $ 11.0  
Legacy Teads        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Total transaction value $ 900.0      
Cash payment $ 625.0      
Stock consideration (in shares) | shares 43,750