Segment Information - Separate Financial Data for Each of Company's Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenue	$ 45,116	$ 69,241	$ 109,365	$ 133,921
Direct operating expenses	22,140	29,655	48,819	58,585
Selling, general and administrative expenses	10,897	13,545	24,488	27,359
Depreciation and amortization	3,873	4,306	8,385	8,222
Operating income (loss)	(1,440)	(11,579)	(36,667)	(6,590)
Corporate expenses	5,384	6,501	12,224	13,395
Change in fair value contingent consideration		(2,735)		(2,376)
Impairment charge		22,368	39,835	22,368
Foreign currency (gain) loss	(155)	(82)	1,353	50
Other operating (gain) loss	(2,030)	(1,597)	(2,866)	(3,593)
Interest expense	(2,024)	(3,554)	(4,704)	(7,044)
Interest income	539	857	1,162	1,776
Dividend income		251	24	506
Income (loss) before income taxes	(2,925)	(14,025)	(40,185)	(11,352)
Capital expenditures	1,933	7,981	5,609	14,823
Total assets	$ 596,174		$ 596,174		$ 656,200
Percentage change in net revenue	(35.00%)		(18.00%)
Percentage change in direct operating expenses	(25.00%)		(17.00%)
Percentage change in selling, general and administrative expenses	(20.00%)		(10.00%)
Percentage change in depreciation and amortization	(10.00%)		2.00%
Percentage change in segment operating profit (loss)	(86.00%)		(40.00%)
Percentage change in corporate expenses	(17.00%)		(9.00%)
Change in fair value contingent consideration	(100.00%)		(100.00%)
Percentage change in impairment charge	(100.00%)		78.00%
Percentage change in foreign currency (gain) loss	89.00%
Percentage change in other operating (gain) loss	27.00%		(20.00%)
Percentage change in operating income (loss)	(88.00%)		456.00%
Percentage change in interest expense	(43.00%)		(33.00%)
Percentage change in interest income	(37.00%)		(35.00%)
Percentage change in dividend income	(100.00%)		(95.00%)
Percentage change in income (loss) before income taxes	(79.00%)		254.00%
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 1,759	12,876	$ 13,879	23,254
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Corporate expenses	5,384	6,501	12,224	13,395
Television
Segment Reporting Information [Line Items]
Net revenue	26,955	38,071	66,154	76,324
Direct operating expenses	13,058	15,157	28,883	30,084
Selling, general and administrative expenses	4,678	5,634	10,610	11,448
Depreciation and amortization	3,411	2,562	6,286	4,822
Capital expenditures	1,325	7,661	4,507	14,002
Total assets	$ 442,074		$ 442,074		465,758
Percentage change in net revenue	(29.00%)		(13.00%)
Percentage change in direct operating expenses	(14.00%)		(4.00%)
Percentage change in selling, general and administrative expenses	(17.00%)		(7.00%)
Percentage change in depreciation and amortization	33.00%		30.00%
Percentage change in segment operating profit (loss)	(61.00%)		(32.00%)
Television \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 5,808	14,718	$ 20,375	29,970
Radio
Segment Reporting Information [Line Items]
Net revenue	6,788	14,366	18,507	26,321
Direct operating expenses	6,139	9,528	13,800	19,036
Selling, general and administrative expenses	3,006	4,396	6,994	9,171
Depreciation and amortization	462	571	949	903
Capital expenditures	135	199	331	581
Total assets	$ 121,806		$ 121,806		138,463
Percentage change in net revenue	(53.00%)		(30.00%)
Percentage change in direct operating expenses	(36.00%)		(28.00%)
Percentage change in selling, general and administrative expenses	(32.00%)		(24.00%)
Percentage change in depreciation and amortization	(19.00%)		5.00%
Percentage change in segment operating profit (loss)			16.00%
Radio \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ (2,819)	(129)	$ (3,236)	(2,789)
Digital
Segment Reporting Information [Line Items]
Net revenue	11,373	16,804	24,704	31,276
Cost of revenue	6,447	8,859	13,794	16,501
Direct operating expenses	2,943	4,970	6,136	9,465
Selling, general and administrative expenses	3,213	3,515	6,884	6,740
Depreciation and amortization		1,173	1,150	2,497
Capital expenditures	473	121	771	240
Total assets	$ 32,294		$ 32,294		$ 51,979
Percentage change in net revenue	(32.00%)		(21.00%)
Percentage change in cost of revenue	(27.00%)		(16.00%)
Percentage change in direct operating expenses	(41.00%)		(35.00%)
Percentage change in selling, general and administrative expenses	(9.00%)		2.00%
Percentage change in depreciation and amortization	(100.00%)		(54.00%)
Percentage change in segment operating profit (loss)	(28.00%)		(17.00%)
Digital \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ (1,230)	$ (1,713)	$ (3,260)	$ (3,927)

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