Segment Information - Separate Financial Data for Each of Company's Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net revenue	$ 197,172	$ 148,880
Cost of revenue	129,891	84,756
Direct operating expenses	27,823	26,561
Selling, general and administrative expenses	16,039	13,853
Depreciation and amortization	6,395	5,184
Operating income (loss)	4,166	11,369
Corporate expenses	8,724	7,158
Change in fair value of contingent consideration	5,100
Impairment charge		1,326
Foreign currency (gain) loss	(847)	586
Other operating (gain) loss	(119)	(1,913)
Interest expense	(1,836)	(1,717)
Interest income	406	140
Dividend income	3	2
Income (loss) before income taxes	2,739	9,794
Capital expenditures	1,517	1,513
Total assets	$ 861,609		$ 851,342
Percentage change in net revenue	32.00%
Percentage change in direct operating expenses	5.00%
Percentage change in selling, general and administrative expenses	16.00%
Percentage change in depreciation and amortization	23.00%
Percentage change in segment operating profit (loss)	(8.00%)
Percentage change in corporate expenses	22.00%
Percentage change in impairment charge	(100.00%)
Percentage change in other operating (gain) loss	(94.00%)
Percentage change in operating income (loss)	(63.00%)
Percentage change in interest expense	7.00%
Percentage change in interest income	190.00%
Percentage change in dividend income	50.00%
Percentage change in income (loss) before income taxes	(72.00%)
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 17,024	18,526
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Corporate expenses	8,724	7,158
Digital
Segment Reporting Information [Line Items]
Cost of revenue	129,891	84,756
Direct operating expenses	7,133	4,901
Selling, general and administrative expenses	8,102	5,949
Depreciation and amortization	2,677	1,581
Capital expenditures	769	336
Total assets	$ 330,204		309,347
Percentage change in cost of revenue	53.00%
Percentage change in direct operating expenses	46.00%
Percentage change in selling, general and administrative expenses	36.00%
Percentage change in depreciation and amortization	69.00%
Percentage change in segment operating profit (loss)	38.00%
Digital | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 5,908	4,295
Digital | Advertising and Retransmission Consent
Segment Reporting Information [Line Items]
Net revenue	$ 153,711	101,482
Percentage change in net revenue	51.00%
Television
Segment Reporting Information [Line Items]
Direct operating expenses	$ 14,283	14,969
Selling, general and administrative expenses	4,957	4,915
Depreciation and amortization	2,893	3,216
Capital expenditures	460	1,031
Total assets	$ 425,867		433,303
Percentage change in direct operating expenses	(5.00%)
Percentage change in selling, general and administrative expenses	1.00%
Percentage change in depreciation and amortization	(10.00%)
Percentage change in segment operating profit (loss)	(33.00%)
Television | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 8,734	12,991
Television | Advertising and Retransmission Consent
Segment Reporting Information [Line Items]
Net revenue	$ 30,867	36,091
Percentage change in net revenue	(14.00%)
Audio
Segment Reporting Information [Line Items]
Direct operating expenses	$ 6,407	6,691
Selling, general and administrative expenses	2,980	2,989
Depreciation and amortization	825	387
Capital expenditures	288	146
Total assets	$ 105,538		$ 108,692
Percentage change in direct operating expenses	(4.00%)
Percentage change in selling, general and administrative expenses	(0.00%)
Percentage change in depreciation and amortization	113.00%
Percentage change in segment operating profit (loss)	92.00%
Audio | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 2,382	1,240
Audio | Advertising and Retransmission Consent
Segment Reporting Information [Line Items]
Net revenue	$ 12,594	$ 11,307
Percentage change in net revenue	11.00%