Segment Information - Separate Financial Data for Each of Company's Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net revenue	$ 64,249	$ 64,680
Direct operating expenses	26,679	28,930
Selling, general and administrative expenses	13,591	13,814
Depreciation and amortization	4,512	3,916
Operating income (loss)	(35,227)	4,989
Corporate expenses	6,840	6,894
Change in fair value contingent consideration		359
Impairment charge	39,835
Foreign currency (gain) loss	1,508	132
Other operating (gain) loss	(836)	(1,996)
Interest expense	(2,680)	(3,490)
Interest income	624	919
Dividend income	23	255
Income (loss) before income taxes	(37,260)	2,673
Capital expenditures	3,676	6,842
Total assets	$ 613,131	656,200	$ 656,200
Percentage change in net revenue	(1.00%)
Percentage change in direct operating expenses	(8.00%)
Percentage change in selling, general and administrative expenses	(2.00%)
Percentage change in depreciation and amortization	15.00%
Percentage change in segment operating profit (loss)	17.00%
Percentage change in corporate expenses	(1.00%)
Change in fair value contingent consideration	(100.00%)
Percentage change in foreign currency (gain) loss	1042.00%
Percentage change in other operating (gain) loss	(58.00%)
Percentage change in interest expense	(23.00%)
Percentage change in interest income	(32.00%)
Percentage change in dividend income	(91.00%)
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 12,120	10,378
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Corporate expenses	6,840	6,894
Television
Segment Reporting Information [Line Items]
Net revenue	39,199	38,253
Direct operating expenses	15,825	14,927
Selling, general and administrative expenses	5,932	5,814
Depreciation and amortization	2,875	2,260
Capital expenditures	3,182	6,341
Total assets	$ 447,242	465,758
Percentage change in net revenue	2.00%
Percentage change in direct operating expenses	6.00%
Percentage change in selling, general and administrative expenses	2.00%
Percentage change in depreciation and amortization	27.00%
Percentage change in segment operating profit (loss)	(4.00%)
Television \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 14,567	15,252
Radio
Segment Reporting Information [Line Items]
Net revenue	11,719	11,955
Direct operating expenses	7,661	9,508
Selling, general and administrative expenses	3,988	4,775
Depreciation and amortization	487	332
Capital expenditures	196	382
Total assets	$ 127,566	138,463
Percentage change in net revenue	(2.00%)
Percentage change in direct operating expenses	(19.00%)
Percentage change in selling, general and administrative expenses	(16.00%)
Percentage change in depreciation and amortization	47.00%
Percentage change in segment operating profit (loss)	(84.00%)
Radio \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ (417)	(2,660)
Digital
Segment Reporting Information [Line Items]
Net revenue	13,331	14,472
Cost of revenue	7,347	7,642
Direct operating expenses	3,193	4,495
Selling, general and administrative expenses	3,671	3,225
Depreciation and amortization	1,150	1,324
Capital expenditures	298	119
Total assets	$ 38,323	51,979
Percentage change in net revenue	(8.00%)
Percentage change in cost of revenue	(4.00%)
Percentage change in direct operating expenses	(29.00%)
Percentage change in selling, general and administrative expenses	14.00%
Percentage change in depreciation and amortization	(13.00%)
Percentage change in segment operating profit (loss)	(8.00%)
Digital \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ (2,030)	$ (2,214)

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