Segment Information - Separate Financial Data for Each of Company's Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Net revenue	$ 120,630	$ 97,156		$ 313,216	$ 257,986
Cost of revenue	50,986	26,801		122,468	73,883
Direct operating expenses	41,247	35,617		114,461	99,174
Selling, general and administrative expenses	19,028	17,112		50,987	45,809
Depreciation and amortization	3,130	3,882		9,634	13,049
Segment operating profit (loss)	(9,086)	7,585		(62,704)	(3,408)
Corporate expenses	6,340	6,930		20,503	29,989
Change in fair value of contingent consideration	0	(650)		0	(630)
Impairment charge	5,705	0		29,378	0
Loss on lease abandonment	0	0		25,191	0
Restructuring costs	3,188	0		3,188	0
Foreign currency (gain) loss	92	(121)		110	120
Interest expense	(3,803)	(4,087)		(11,503)	(12,648)
Interest income	574	646		1,798	1,801
Dividend income	1	0		2	10
Realized gain (loss) on marketable securities	2	(1)		6	(110)
Gain (loss) on debt extinguishment	(176)	0		(214)	(91)
Income (loss) before income taxes	(12,488)	4,143		(72,615)	(14,446)
Capital expenditures	$ 1,187		$ 1,051	$ 5,571	4,844
Percentage change in net revenue	24.00%			21.00%
Percentage change in cost of revenue	90.00%			66.00%
Percentage change in direct operating expenses	16.00%			15.00%
Percentage change in selling, general and administrative expenses	11.00%			11.00%
Percentage change in depreciation and amortization	(19.00%)			(26.00%)
Percentage change in corporate expenses	(9.00%)			(32.00%)
Percentage change in fair value of contingent consideration	(100.00%)			(100.00%)
Percentage change in foreign currency (gain) loss				(8.00%)
Percentage change in operating income (loss)				1740.00%
Percentage change in interest expense	(7.00%)			(9.00%)
Percentage change in interest income	(11.00%)			(0.00%)
Percentage change in dividend income				(80.00%)
Percentage change in gain (loss) on debt extinguishment				135.00%
Percentage change in income (loss) before income taxes				403.00%
Operating Segments
Segment Reporting Information [Line Items]
Segment operating profit (loss)	$ 6,239	13,744		$ 15,666	26,071
Percentage change in segment operating profit (loss)	(55.00%)			(40.00%)
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Corporate expenses	$ 6,340	6,930		$ 20,503	29,989
Media
Segment Reporting Information [Line Items]
Cost of revenue	5,015	4,881		12,932	11,888
Direct operating expenses	28,596	29,193		81,941	82,405
Selling, general and administrative expenses	11,598	10,860		33,409	30,600
Depreciation and amortization	2,808	3,165		8,385	9,756
Capital expenditures	$ 1,154	1,020		$ 5,484	4,546
Percentage change in cost of revenue	3.00%			9.00%
Percentage change in direct operating expenses	(2.00%)			(1.00%)
Percentage change in selling, general and administrative expenses	7.00%			9.00%
Percentage change in depreciation and amortization	(11.00%)			(14.00%)
Media \| Operating Segments
Segment Reporting Information [Line Items]
Segment operating profit (loss)	$ (3,512)	11,703		$ (5,772)	20,152
Media \| Advertising and Retransmission Consent
Segment Reporting Information [Line Items]
Net revenue	$ 44,505	59,802		$ 130,895	154,801
Percentage change in net revenue	(26.00%)			(15.00%)
Advertising Technology & Services
Segment Reporting Information [Line Items]
Net revenue	$ 76,125	37,354		$ 182,321	103,185
Cost of revenue	45,971	21,920		109,536	61,995
Direct operating expenses	12,651	6,424		32,520	16,769
Selling, general and administrative expenses	7,430	6,252		17,578	15,209
Depreciation and amortization	322	717		1,249	3,293
Capital expenditures	$ 33	31		$ 87	298
Percentage change in net revenue	104.00%			77.00%
Percentage change in cost of revenue	110.00%			77.00%
Percentage change in direct operating expenses	97.00%			94.00%
Percentage change in selling, general and administrative expenses	19.00%			16.00%
Percentage change in depreciation and amortization	(55.00%)			(62.00%)
Advertising Technology & Services \| Operating Segments
Segment Reporting Information [Line Items]
Segment operating profit (loss)	$ 9,751	$ 2,041		$ 21,438	$ 5,919
Percentage change in segment operating profit (loss)	378.00%			262.00%

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