The Company and Significant Accounting Policies - Additional Information (Detail)				3 Months Ended		12 Months Ended	13 Months Ended
	Mar. 17, 2023 USD ($)	Mar. 16, 2023	Nov. 30, 2017 USD ($)	Mar. 31, 2023 USD ($) Unit Country AdvertisingCustomer Station Advertiser Market Segment $ / shares shares	Mar. 31, 2022 USD ($) shares	Dec. 31, 2022 USD ($) Advertiser	Mar. 31, 2023 USD ($) Unit Country AdvertisingCustomer Advertiser Market shares	Mar. 01, 2022 USD ($)	Nov. 01, 2021	Sep. 01, 2021	Jul. 01, 2021	Oct. 13, 2020
Accounting Policies [Line Items]
Number of reportable segments | Segment				3
Number of business units | Unit				4			4
Sales Operations in Number of Countries | Country				40			40
Restricted cash				$ 757,000	$ 749,000	$ 753,000	$ 757,000
Amount due from television stations for carriage				6,400,000			6,400,000
Retransmission consent revenue				$ 9,600,000	9,200,000
Number of Class A common stock shares converted | shares				1
Share-based compensation expenses				$ 4,100,000	$ 2,600,000
Shares of dilutive securities not included in computation of diluted earnings per share | shares				1,870,073	17,411
Amount approved under share purchase								$ 20,000,000
Aggregate purchase price of repurchased shares					$ 7,142,000
Gain (loss) on debt extinguishment				$ (1,556,000)
Unamortized debt issuance costs				$ 1,305,000		$ 1,221,000	$ 1,305,000
Number of advertisers represent more than five percent of trade receivables | Advertiser				0			0
Number of advertising customer represented more than five percent of revenue | AdvertisingCustomer				0			0
Estimated losses for bad debts				$ 900,000	100,000
Bad debts actually charged off				200,000	100,000
Interest income related to available-for-sale securities				$ 860,000	$ 406,000
Customer Concentration Risk | Revenue | Commercial Partner
Accounting Policies [Line Items]
Concentration risk percentage				51.00%	53.00%
Largest Advertisers | Customer Concentration Risk | Trade Receivables
Accounting Policies [Line Items]
Number of largest advertisers | Advertiser				5		5	5
Concentration risk percentage				9.00%		2.00%
Largest Advertisers | Customer Concentration Risk | Revenue
Accounting Policies [Line Items]
Concentration risk percentage				12.00%	18.00%
Cisneros Interactive
Accounting Policies [Line Items]
Remaining ownership interest acquired				49.00%			49.00%			49.00%
Ownership interest acquired										100.00%		51.00%
MediaDonuts
Accounting Policies [Line Items]
Ownership interest acquired				100.00%			100.00%				100.00%
365 Digital
Accounting Policies [Line Items]
Ownership interest acquired				100.00%			100.00%		100.00%
Available-for-Sale Securities
Accounting Policies [Line Items]
Interest income related to available-for-sale securities				$ 500,000	$ 400,000
2017 Credit Facility
Accounting Policies [Line Items]
Agreement date			Nov. 30, 2017
Additional borrowing capacity			$ 100,000,000.0
First lien net leverage ratio			4.00%
Gain (loss) on debt extinguishment	$ (1,600,000)
Write-off of unamortized debt issuance costs	$ 1,100,000
2017 Credit Facility | Eurodollar Rate
Accounting Policies [Line Items]
Variable interest rate basis spread on debt			2.75%
2017 Credit Facility | Base Rate Margin
Accounting Policies [Line Items]
Variable interest rate basis spread on debt			1.75%
2017 Credit Facility | Term Loan B Facility
Accounting Policies [Line Items]
Senior Secured debt			$ 300,000,000.0
Interest rate		7.38%
Maturity date of revolving credit facility			Nov. 30, 2024
2023 Credit Facility
Accounting Policies [Line Items]
Agreement date	Mar. 17, 2023
Additional borrowing capacity	$ 100,000,000
First lien net leverage ratio	2.25%
Maturity date of revolving credit facility	Mar. 17, 2028
Debt issuance costs	$ 1,300,000
Certain customary events of default, number of business days to default in the payment of interest on borrowings				3 days
Certain customary events of default, number of business days to default in the payment of any other amounts				5 days
Certain customary events of default, number of days default continue for compliance with other agreement				30 days
Certain customary events of default, number of days default continue for financial statement delivery obligations				10 days
Certain customary events of default, indebtedness aggregate amount				$ 15,000,000.0
Certain customary events of default, failure in payment of final judgments aggregate amount				$ 15,000,000.0
Certain customary events of default, failure in payment of final judgments aggregate amount period				30 days
2023 Credit Facility | Term Loan A Facility
Accounting Policies [Line Items]
Senior Secured debt	200,000,000
Interest rate				7.66%
Unamortized debt issuance costs				$ 1,300,000			$ 1,300,000
Estimated fair value of term loan				$ 198,700,000			$ 198,700,000
2023 Credit Facility | Revolving Credit Facility
Accounting Policies [Line Items]
Senior Secured debt	75,000,000
Amount drawn	$ 11,500,000
Interest rate				7.66%
Class A common stock
Accounting Policies [Line Items]
Number of shares repurchased | shares				0			1,800,000
Aggregate purchase price of repurchased shares				$ 11,300,000
Average price of repurchased shares | $ / shares				$ 6.43
Restricted Stock Units
Accounting Policies [Line Items]
Total unrecognized compensation expense related to grants of restricted stock units				$ 29,000,000.0			$ 29,000,000.0
Weighted average period for unrecognized compensation expense related to grants of restricted stock units				1 year 9 months 18 days
TelevisaUnivision
Accounting Policies [Line Items]
Payment of sales representation fees to television stations				$ 1,400,000	1,600,000
Number of markets involved in sales and marketing | Market				3
Retransmission consent revenue				$ 6,600,000	$ 6,300,000
Common stock percentage held by Univision				11.00%			11.00%
UniMas
Accounting Policies [Line Items]
Affiliate advertising minutes per hour for which entity has right to sell				4 minutes 30 seconds
Minimum | 2023 Credit Facility | Base Rate Margin
Accounting Policies [Line Items]
Variable interest rate basis spread on debt	1.50%
Minimum | 2023 Credit Facility | SOFR
Accounting Policies [Line Items]
Variable interest rate basis spread on debt	2.50%
Minimum | 2023 Credit Facility | Revolving Credit Facility
Accounting Policies [Line Items]
Interest rate	0.30%
Minimum | Restricted Stock Units
Accounting Policies [Line Items]
Vesting period				1 year
Minimum | TelevisaUnivision
Accounting Policies [Line Items]
Affiliate advertising minutes per hour for which entity has right to sell				4 minutes
Maximum
Accounting Policies [Line Items]
Terminated stock repurchase program amount								$ 45,000,000
Maximum | 2023 Credit Facility | Base Rate Margin
Accounting Policies [Line Items]
Variable interest rate basis spread on debt	2.00%
Maximum | 2023 Credit Facility | SOFR
Accounting Policies [Line Items]
Variable interest rate basis spread on debt	3.00%
Maximum | 2023 Credit Facility | Revolving Credit Facility
Accounting Policies [Line Items]
Interest rate	0.40%
Maximum | Restricted Stock Units
Accounting Policies [Line Items]
Vesting period				4 years
Television
Accounting Policies [Line Items]
Number of stations owned | Station				49
Radio
Accounting Policies [Line Items]
Number of stations owned | Station				45
Number of markets operated | Market				14			14
Advertisements and Syndicate Radio Programming | Minimum
Accounting Policies [Line Items]
Number of markets owned | Market				100