Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) Market Agreement shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Jan. 01, 2019 USD ($)
Accounting Policies [Line Items]
Cash and cash equivalents	$ 33,123				$ 46,733				$ 33,123	$ 46,733
Restricted cash	734				732				734	732
Available for sale securities	91,662				132,424				91,662	132,424
Estimated losses for bad debts									2,300	1,800	$ 1,100
Bad debts actually charged off									2,800	1,200	1,100
Long term debt fair value	211,700				241,300				$ 211,700	241,300
Percentage of tax benefit recognized									50.00%
Advertising expense									$ 500	100	600
Net revenue	70,838	$ 68,816	$ 69,241	$ 64,680	82,073	$ 74,575	$ 74,329	$ 66,838	273,575	297,815	536,034
Broadcast trade cost									$ 500	$ 700	$ 900
Shares of dilutive securities not included in computation of diluted earnings per share | shares									1,117,216	182,847	243,234
Other comprehensive income (loss), net of tax									$ 1,281	$ (1,352)	$ 2,917
Operating leases right of use asset	43,837								43,837			$ 45,800
Lease liabilities	50,443								50,443			$ 52,400
Broadcast Equipment
Accounting Policies [Line Items]
Net revenue									$ 500	700	$ 900
Univision
Accounting Policies [Line Items]
Number of marketing and sales agreements | Agreement									2
Number of markets involved in sales and marketing | Market									6
Chanclazo Studios, Inc
Accounting Policies [Line Items]
Equity method investments	$ 1,300								$ 1,300
Equity method investment ownership percentage	18.00%								18.00%
Cocina Vista, LLC
Accounting Policies [Line Items]
Equity method investments	$ 2,600								$ 2,600
Equity method investment ownership percentage	49.00%								49.00%
Accounting Standards Update 2016-18
Accounting Policies [Line Items]
Restricted cash					700					700
Outside the United States
Accounting Policies [Line Items]
Cash and cash equivalents	$ 9,100				$ 5,300				$ 9,100	$ 5,300