Segment Data - Separate Financial Data for Each of Company's Operating Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenue	$ 760,192	$ 344,026	$ 273,575
Cost of revenue	466,517	106,928	36,757
Direct operating expenses	116,449	104,909	119,412
Selling, general and administrative expenses	56,585	48,404	53,965
Depreciation and amortization	22,420	17,282	16,648
Operating income (loss)	60,471	6,608	(1,653)
Corporate expenses	32,993	27,807	28,067
Change in fair value of contingent consideration	8,224		(6,478)
Impairment charge	3,023	40,035	32,097
Foreign currency (gain) loss	508	(1,052)	754
Other operating (gain) loss	(6,998)	(6,895)	(5,994)
Capital expenditures	5,611	9,484	25,284
Total assets	$ 851,342	$ 747,345	656,200
Percentage change in net revenue	121.00%	26.00%
Percentage change in direct operating expenses	(11.00%)	(12.00%)
Percentage change in selling, general and administrative expenses	(17.00%)	(10.00%)
Percentage change in depreciation and amortization	30.00%	4.00%
Percentage change in segment operating profit (loss)	48.00%	42.00%
Percentage change in corporate expenses	(19.00%)	(1.00%)
Percentage change in fair value of contingent consideration		(100.00%)
Percentage change in impairment charge	(92.00%)	25.00%
Percentage change in other operating (gain) loss	1.00%	15.00%
Percentage change in operating income (loss)	815.00%
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 98,221	$ 66,503	46,793
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Corporate expenses	32,993	27,807	28,067
Television
Segment Reporting Information [Line Items]
Direct operating expenses	63,016	61,145	61,778
Selling, general and administrative expenses	18,381	19,748	22,638
Depreciation and amortization	12,477	12,918	10,059
Capital expenditures	2,833	7,184	24,174
Total assets	$ 433,303	$ 425,899	465,758
Percentage change in direct operating expenses	(7.00%)	(13.00%)
Percentage change in selling, general and administrative expenses	3.00%	(1.00%)
Percentage change in depreciation and amortization	(3.00%)	28.00%
Percentage change in segment operating profit (loss)	(13.00%)	10.00%
Television \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 52,965	$ (60,645)	55,179
Digital
Segment Reporting Information [Line Items]
Cost of revenue	466,517	106,928	36,757
Direct operating expenses	25,481	15,227	18,357
Selling, general and administrative expenses	26,123	15,404	13,904
Depreciation and amortization	8,377	2,561	4,723
Capital expenditures	2,073	1,659	318
Total assets	$ 309,347	$ 196,020	51,979
Percentage change in cost of revenue	336.00%	191.00%
Percentage change in direct operating expenses	67.00%	(17.00%)
Percentage change in selling, general and administrative expenses	70.00%	11.00%
Percentage change in depreciation and amortization	227.00%	(46.00%)
Percentage change in segment operating profit (loss)	804.00%
Digital \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 28,840	$ 3,189	(4,833)
Audio
Segment Reporting Information [Line Items]
Direct operating expenses	27,952	28,537	39,277
Selling, general and administrative expenses	12,081	13,252	17,423
Depreciation and amortization	1,566	1,803	1,866
Capital expenditures	705	641	792
Total assets	$ 108,692	$ 125,426	138,463
Percentage change in direct operating expenses	(2.00%)	(27.00%)
Percentage change in selling, general and administrative expenses	(9.00%)	(24.00%)
Percentage change in depreciation and amortization	(13.00%)	(3.00%)
Percentage change in segment operating profit (loss)	515.00%
Audio \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 16,416	$ 2,669	(3,553)
Advertising and Retransmission Consent \| Television
Segment Reporting Information [Line Items]
Net revenue	$ 146,839	$ 154,456	149,654
Percentage change in net revenue	(5.00%)	3.00%
Advertising and Retransmission Consent \| Digital
Segment Reporting Information [Line Items]
Net revenue	$ 555,338	$ 143,309	68,908
Percentage change in net revenue	288.00%	108.00%
Advertising and Retransmission Consent \| Audio
Segment Reporting Information [Line Items]
Net revenue	$ 58,015	$ 46,261	$ 55,013
Percentage change in net revenue	25.00%	(16.00%)

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