Segment Information - Separate Financial Data for Each of Company's Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net revenue	$ 221,695	$ 178,410	$ 418,867	$ 327,290
Cost of revenue	144,965	109,030	274,856	193,786
Direct operating expenses	29,596	28,336	57,419	54,897
Selling, general and administrative expenses	17,775	13,106	33,814	26,959
Depreciation and amortization	6,263	5,074	12,658	10,258
Operating income (loss)	13,441	16,239	17,607	27,608
Corporate expenses	8,520	7,345	17,244	14,503
Change in fair value of contingent consideration	976		6,076
Impairment charge		112		1,438
Foreign currency (gain) loss	993	(309)	146	277
Other operating (gain) loss	(834)	(523)	(953)	(2,436)
Interest expense	(2,334)	(1,856)	(4,170)	(3,573)
Interest income	722	83	1,128	223
Dividend income	11	2	14	4
Income (loss) before income taxes	11,840	14,468	14,579	24,262
Capital expenditures	1,891	1,115	3,408	2,628
Total assets	$ 840,203		$ 840,203		$ 851,342
Percentage change in net revenue	24.00%		28.00%
Percentage change in direct operating expenses	4.00%		5.00%
Percentage change in selling, general and administrative expenses	36.00%		25.00%
Percentage change in depreciation and amortization	23.00%		23.00%
Percentage change in segment operating profit (loss)	1.00%		3.00%
Percentage change in corporate expenses	16.00%		19.00%
Percentage change in impairment charge	(100.00%)		(100.00%)
Percentage change in foreign currency (gain) loss			(47.00%)
Percentage change in other operating (gain) loss	(59.00%)		(61.00%)
Percentage change in operating income (loss)	17.00%		(36.00%)
Percentage change in interest expense	26.00%		17.00%
Percentage change in interest income	770.00%		406.00%
Percentage change in dividend income	450.00%		250.00%
Percentage change in income (loss) before income taxes	18.00%		(40.00%)
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 23,096	22,864	$ 40,120	41,390
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Corporate expenses	8,520	7,345	17,244	14,503
Digital
Segment Reporting Information [Line Items]
Cost of revenue	144,965	109,030	274,856	193,786
Direct operating expenses	7,843	6,238	14,976	11,139
Selling, general and administrative expenses	9,419	5,789	17,521	11,738
Depreciation and amortization	2,644	1,613	5,321	3,194
Capital expenditures	1,092	538	1,861	874
Total assets	$ 350,725		$ 350,725		309,347
Percentage change in cost of revenue	33.00%		42.00%
Percentage change in direct operating expenses	26.00%		34.00%
Percentage change in selling, general and administrative expenses	63.00%		49.00%
Percentage change in depreciation and amortization	(64.00%)		(67.00%)
Percentage change in segment operating profit (loss)	26.00%		30.00%
Digital | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 9,507	7,553	$ 15,415	11,848
Digital | Advertising and Retransmission Consent
Segment Reporting Information [Line Items]
Net revenue	$ 174,378	130,223	$ 328,089	231,705
Percentage change in net revenue	34.00%		42.00%
Television
Segment Reporting Information [Line Items]
Direct operating expenses	$ 14,488	15,203	$ 28,771	30,172
Selling, general and administrative expenses	5,238	4,313	10,195	9,228
Depreciation and amortization	2,808	3,107	5,701	6,323
Capital expenditures	676	430	1,136	1,461
Total assets	$ 384,087		$ 384,087		433,303
Percentage change in direct operating expenses	(5.00%)		(5.00%)
Percentage change in selling, general and administrative expenses	21.00%		10.00%
Percentage change in depreciation and amortization	(10.00%)		(10.00%)
Percentage change in segment operating profit (loss)	14.00%		(24.00%)
Television | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 9,839	11,434	$ 18,573	24,425
Television | Advertising and Retransmission Consent
Segment Reporting Information [Line Items]
Net revenue	$ 32,373	34,057	$ 63,240	70,148
Percentage change in net revenue	(5.00%)		(10.00%)
Audio
Segment Reporting Information [Line Items]
Direct operating expenses	$ 7,265	6,895	$ 13,672	13,586
Selling, general and administrative expenses	3,118	3,004	6,098	5,993
Depreciation and amortization	811	354	1,636	741
Capital expenditures	123	147	411	293
Total assets	$ 105,391		$ 105,391		$ 108,692
Percentage change in direct operating expenses	5.00%		(1.00%)
Percentage change in selling, general and administrative expenses	4.00%		(2.00%)
Percentage change in depreciation and amortization	(129.00%)		121.00%
Percentage change in segment operating profit (loss)	3.00%		20.00%
Audio | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 3,750	3,877	$ 6,132	5,117
Audio | Advertising and Retransmission Consent
Segment Reporting Information [Line Items]
Net revenue	$ 14,944	$ 14,130	$ 27,538	$ 25,437
Percentage change in net revenue	6.00%		8.00%