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The Company and Significant Accounting Policies - Additional Information (Detail) $ in Thousands			1 Months Ended				3 Months Ended			9 Months Ended
	Jul. 15, 2025 USD ($)	Mar. 17, 2023 USD ($)	Jun. 30, 2025 USD ($) Building	Mar. 31, 2025 USD ($) Station	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2025 USD ($) shares	Mar. 31, 2025 USD ($)	Sep. 30, 2024 USD ($) shares	Sep. 30, 2025 USD ($) Agreement Segment shares	Sep. 30, 2024 USD ($) shares	Dec. 31, 2024 USD ($)
Accounting Policies [Line Items]
Number of reportable segments \| Segment										2
Impairment charge related to broadcast licenses and fixed assets							$ 5,500	$ 23,700
Assets held for sale							5,597			$ 5,597
Restricted cash							795		$ 783	795	$ 783	$ 786
Retransmission consent revenue							$ 7,400		$ 8,000	$ 23,200	$ 26,000
Shares of dilutive securities not included in computation of diluted earnings per share \| shares							3,734,557		1,141,172	2,383,032	1,092,389
Prepayment of credit facility			$ 10,000		$ 10,000	$ 10,000
Gain (loss) on debt extinguishment							$ (176)		$ 0	$ (214)	$ (91)
Unamortized debt issuance costs							710			$ 710		$ 792
Discontinued Operations Held for Sale
Accounting Policies [Line Items]
Number of television stations held for sale \| Station				2
Number of owned office building \| Building			3
Letter of intent term for parties to reach definitive agreement										60 days
Impairment charge related to broadcast licenses and fixed assets							5,500	23,700
Assets held for sale				$ 1,700			3,000	1,700		$ 3,000
Carrying value of broadcast licenses				28,000				28,000
Stations fixed assets carrying value				400				400
Discontinued Operations Held for Sale \| Tijuana, Mexico
Accounting Policies [Line Items]
Assets held for sale				4,700				4,700
Discontinued Operations Held for Sale \| Tecate, Mexico
Accounting Policies [Line Items]
Assets held for sale				$ 4,700				$ 4,700
Discontinued Operations Held for Sale \| Corpus Christi, El Centro, and Midland, Texas
Accounting Policies [Line Items]
Assets held for sale							2,600			$ 2,600
TelevisaUnivision
Accounting Policies [Line Items]
Number of marketing and sales agreements \| Agreement										2
Number of markets involved in sales and marketing \| Agreement										3
Payment of sales representation fees to television stations							1,200		2,600	$ 3,700	5,600
Retransmission consent revenue							$ 5,200		$ 5,700	$ 16,100	18,200
Common stock percentage held by Univision							10.00%			10.00%
UniMas
Accounting Policies [Line Items]
Affiliate advertising minutes per hour for which entity has right to sell										4 minutes 30 seconds
Related Parties
Accounting Policies [Line Items]
Amount due from television stations for carriage							$ 3,200			$ 3,200
Term Loan A Facility
Accounting Policies [Line Items]
Prepayment of credit facility					$ 4,900
Principal payment						8,750
Revolving Credit Facility
Accounting Policies [Line Items]
Line of Credit						$ 1,250
Revolving Credit Facility
Accounting Policies [Line Items]
Additional borrowing capacity		$ 100,000
First lien net leverage ratio		2.25%
Maturity date of revolving credit facility		Mar. 17, 2028
Debt issuance costs		$ 1,800
Gain (loss) on debt extinguishment							(200)			(200)	$ (100)
Revolving Credit Facility \| Term Loan A Facility
Accounting Policies [Line Items]
Senior Secured debt		200,000
Unamortized debt issuance costs							700			700
Estimated fair value of term loan							$ 161,800			$ 161,800
Revolving Credit Facility \| Revolving Credit Facility
Accounting Policies [Line Items]
Senior Secured debt		75,000
Amount drawn		11,500
Interest rate										7.26%
Original 2023 Credit Agreement \| Revolving Credit Facility
Accounting Policies [Line Items]
Senior Secured debt		75,000
Increase in quarterly amortization		2,500
Increase in cash netting		$ 50,000
Financial covenants to net leverage ratio		3.25%
Interest coverage ratio to minimum permitted ratio		3.00%
Amended 2023 Credit Agreement
Accounting Policies [Line Items]
Debt issuance costs	$ 300
Financial covenants to net leverage ratio										4.00%
Interest coverage ratio to minimum permitted ratio										2.00%
Amended 2023 Credit Agreement \| Revolving Credit Facility
Accounting Policies [Line Items]
Senior Secured debt	$ 30,000
Effective date	Jul. 15, 2025
Increase in quarterly amortization	$ 5,000
Increase in cash netting	$ 60,000
Outstanding loans and commitments fee percent	0.05%
Financial covenants to net leverage ratio	4.00%
Interest coverage ratio to minimum permitted ratio	2.00%
Minimum \| TelevisaUnivision
Accounting Policies [Line Items]
Affiliate advertising minutes per hour for which entity has right to sell										4 minutes
Minimum \| Revolving Credit Facility \| Base Rate Margin
Accounting Policies [Line Items]
Variable interest rate basis spread on debt		1.50%
Minimum \| Revolving Credit Facility \| SOFR
Accounting Policies [Line Items]
Variable interest rate basis spread on debt		2.50%
Minimum \| Revolving Credit Facility \| Revolving Credit Facility
Accounting Policies [Line Items]
Interest rate		0.30%
Maximum \| Revolving Credit Facility \| Base Rate Margin
Accounting Policies [Line Items]
Variable interest rate basis spread on debt		2.00%
Maximum \| Revolving Credit Facility \| SOFR
Accounting Policies [Line Items]
Variable interest rate basis spread on debt		3.00%
Maximum \| Revolving Credit Facility \| Revolving Credit Facility
Accounting Policies [Line Items]
Interest rate		0.40%