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Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Goodwill [Line Items]      
Goodwill, Beginning balance $ 50,674,000 $ 47,194,000  
Impairment (43,322,000)    
Goodwill Additions From Acquisitions   3,480,000  
Goodwill, Ending balance 7,352,000 50,674,000 $ 47,194,000
Digital      
Goodwill [Line Items]      
Impairment   0 0
Media      
Goodwill [Line Items]      
Goodwill, Beginning balance 43,322,000 43,322,000  
Impairment (43,322,000)    
Goodwill Additions From Acquisitions   0  
Goodwill, Ending balance 0 43,322,000 43,322,000
Television      
Goodwill [Line Items]      
Impairment   0 0
Advertising Technology And Services      
Goodwill [Line Items]      
Goodwill, Beginning balance 7,352,000 3,872,000  
Acquisition   3,480,000  
Impairment 0    
Goodwill, Ending balance $ 7,352,000 7,352,000 3,872,000
Audio      
Goodwill [Line Items]      
Impairment   $ 0 $ 0