The Company and Significant Accounting Policies- Changes in Carrying Amount of Goodwill (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Goodwill [Line Items]
Goodwill, Beginning balance	$ 90,672,000
Goodwill, Impairment	(35,400,000)
Goodwill, Ending balance	55,272,000	$ 90,672,000
Digital
Goodwill [Line Items]
Goodwill, Beginning balance	50,123,000
Goodwill, Impairment	(35,400,000)	0
Goodwill, Ending balance	14,723,000	50,123,000
Television
Goodwill [Line Items]
Goodwill, Beginning balance	40,549,000
Goodwill, Impairment	0
Goodwill, Ending balance	$ 40,549,000	$ 40,549,000