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The Company and Significant Accounting Policies - Impairment and Loss on Lease Abandonment - Additional Information (Detail) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 31, 2025 USD ($) Station | Sep. 30, 2025 USD ($) ft² Facility | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | Sep. 30, 2025 USD ($) ft² Facility | Dec. 31, 2024 USD ($) | Oct. 01, 2024 USD ($)
Accounting Policies [Line Items] |  |  |  |  |  |  |
Goodwill |  | $ 7,352 |  |  | $ 7,352 | $ 7,352 |
Assets held for sale |  | 5,597 |  |  | $ 5,597 |  |
Impairment charge related to broadcast licenses and fixed assets |  | 5,500 | $ 23,700 |  |  |  |
Lease expiration date |  |  |  |  | Jun. 30, 2034 |  |
Operating lease liabilities |  | 7,494 |  |  | $ 7,494 | 7,744 |
Long-term operating lease liabilities |  | $ 38,942 |  |  | $ 38,942 | 42,101 |
Building |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Leased space | ft² |  | 38,000 |  |  | 38,000 |  |
Lease expiration date |  |  |  |  | Jan. 31, 2034 |  |
Loss on lease abandonment charges |  |  | 16,100 |  |  |  |
Acceleration of depreciation of leasehold improvements |  |  | 9,100 |  |  |  |
Operating lease liabilities |  | $ 1,700 |  |  | $ 1,700 |  |
Long-term operating lease liabilities |  | $ 21,600 |  |  | $ 21,600 |  |
Number of of leased facilities abandoned | Facility |  | 5 |  |  | 5 |  |
Discontinued Operations Held for Sale |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Number of television stations held for sale | Station | 2 |  |  |  |  |  |
Assets held for sale | $ 1,700 | $ 3,000 | 1,700 |  | $ 3,000 |  |
Carrying value of additional assets |  | 3,800 |  |  | $ 3,800 |  |
Impairment charge related to broadcast licenses and fixed assets |  | $ 5,500 | 23,700 |  |  |  |
Carrying value of broadcast licenses | 28,000 |  | 28,000 |  |  |  |
Stations fixed assets carrying value | 400 |  | 400 |  |  |  |
Discontinued Operations Held for Sale | Tecate, Mexico |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Assets held for sale | 4,700 |  | 4,700 |  |  |  |
Discontinued Operations Held for Sale | Tijuana, Mexico |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Assets held for sale | $ 4,700 |  | $ 4,700 |  |  |  |
Meta Platforms |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Impairment charges related to intangible subject to amortization |  |  |  | $ 14,000 |  |  |
Media |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 43,300
Goodwill, impaired, method for fair value determination |  |  |  |  | As of the most recent annual goodwill testing date, October 1, 2024, there was $43.3 million of goodwill in the media reporting unit. Based on the assumptions and estimates discussed in the Company's 2024 10-K, the media reporting unit carrying value exceeded its fair value, resulting in a goodwill impairment charge of $43.3 million for the year ended December 31, 2024. This impairment charge was a result of the Company updating its internal forecasts of future performance based on lower than anticipated political advertising revenue in the fourth quarter of 2024 and higher projected future costs due to planned investments in news programming and the sales and marketing teams. The calculation of the fair value of the reporting unit requires estimates of the discount rate and the long term projected growth rate. |  |
Impairment of goodwill |  |  |  |  |  | 43,300 |
Number of of leased facilities abandoned | Facility |  | 5 |  |  | 5 |  |
Media | FCC Licenses |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Impairment charge related to indefinite life intangible assets |  |  |  |  |  | $ 17,900 |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  |  |  | Asset Impairment Charges |
Media | Meta Platforms |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Impairment of goodwill |  |  |  | $ 35,400 |  |  |
Advertising Technology & Services |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 7,400
Goodwill, impaired, method for fair value determination |  |  |  |  | Additionally, as of the most recent annual goodwill testing date, October 1, 2024, there was $7.4 million of goodwill in the advertising technology & services reporting unit. Based on the assumptions and estimates discussed in the Company's 2024 10-K, the fair value of the advertising technology & services reporting unit exceeded its carrying value by over 100%, resulting in no impairment charge for the year ended December 31, 2024. The calculation of the fair value of the advertising technology & services reporting unit requires estimates of the discount rate and the long term projected growth rate. |  |
Percentage of fair value of assets |  |  |  |  |  | 100.00% |
Impairment of goodwill |  |  |  |  |  | $ 0 |

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