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Related Party Transactions - Narrative (Details)
 3 Months Ended 9 Months Ended
Jun. 24, 2025
Jul. 24, 2024
USD ($)
shares
Jun. 27, 2024
Dec. 26, 2023
Jun. 15, 2023
Nov. 06, 2022
USD ($)
Mar. 10, 2021
USD ($)
Sep. 30, 2025
USD ($)
board_member
shares
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2025
USD ($)
board_member
shares
Sep. 30, 2024
USD ($)
shares
Jun. 30, 2025
shares
Mar. 31, 2025
shares
Dec. 31, 2024
USD ($)
shares
Jun. 30, 2024
shares
Mar. 31, 2024
shares
Dec. 31, 2023
shares
Related Party Transaction                                  
Common stock, shares outstanding (in shares) | shares               5,015,664   5,015,664       4,890,575      
Deferred dividend rate (percent) 0.095   0.095 0.095 0.095                        
Convertible redeemable preferred stock, net of issuance costs (in shares) | shares   13,257,294             13,257,294 [1]                
Accrued dividends   $ 32,800,000           $ 22,900,000   $ 22,900,000              
Preferred stock owned, (in shares) | shares               95,784,903 95,784,903 95,784,903 95,784,903 95,784,903 95,784,903 95,784,903 82,527,609 82,527,609 82,527,609
Revenues [2],[3]               $ 88,906,000 $ 88,479,000 $ 264,004,000 $ 261,111,000            
Related Party                                  
Related Party Transaction                                  
Accrued dividends               22,900,000   22,900,000       $ 9,000,000.0      
Revenues               $ 2,523,000 2,597,000 $ 7,412,000 7,512,000            
WPP | Related Party                                  
Related Party Transaction                                  
Common stock, shares outstanding (in shares) | shares               565,968   565,968              
Common stock, percentage of shares outstanding owned               11.30%   11.30%              
Revenues               $ 1,720,000 1,789,000 $ 5,232,000 5,051,000            
Charter | Related Party                                  
Related Party Transaction                                  
Preferred stock, percentage of shares outstanding owned               33.30%   33.30%              
Number of directors designated to the company's board | board_member               2   2              
Preferred stock owned, (in shares) | shares               31,928,301   31,928,301       31,928,301      
Revenues               $ 501,000 501,000 $ 1,503,000 1,543,000            
Pine                                  
Related Party Transaction                                  
Amount of transaction               $ 0 0 $ 0 0            
Pine | Related Party                                  
Related Party Transaction                                  
Common stock, shares outstanding (in shares) | shares               109,654   109,654              
Common stock, percentage of shares outstanding owned               2.20%   2.20%              
Preferred stock, percentage of shares outstanding owned               33.30%   33.30%              
Number of directors designated to the company's board | board_member               2   2              
Preferred stock owned, (in shares) | shares               31,928,301   31,928,301       31,928,301      
Liberty                                  
Related Party Transaction                                  
Amount of transaction               $ 0 0 $ 0 0            
Liberty | Related Party                                  
Related Party Transaction                                  
Preferred stock, percentage of shares outstanding owned               33.30%   33.30%              
Number of directors designated to the company's board | board_member               2   2              
Preferred stock owned, (in shares) | shares               31,928,301   31,928,301       31,928,301      
Charter Operating | License fee credits                                  
Related Party Transaction                                  
Amount of transaction           $ 7,000,000                      
Charter Operating | Related Party                                  
Related Party Transaction                                  
Purchase commitment term (in years)             10 years                    
Purchase commitment, year one amount             $ 10,000,000                    
Purchase commitment, year ten amount             $ 32,300,000                    
Directors & Officers | Related Party                                  
Related Party Transaction                                  
Revenues               $ 300,000 300,000 $ 700,000 900,000            
Qurate | Related Party                                  
Related Party Transaction                                  
Revenues                 $ 200,000   $ 600,000            
[1] Transactions for these line items were exclusively with related parties. Refer to Footnote 5, Convertible Redeemable Preferred Stock and Stockholders' Equity (Deficit) and Footnote 9, Related Party Transactions.
[2]
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Revenues$2,523 $2,597 $7,412 $7,512 
Cost of revenues5,679 7,364 16,880 22,964 
Convertible redeemable preferred stock dividends(4,971)(4,578)(13,904)(13,062)
[3]
(1) Transactions with related parties are included in the line items above as follows. Refer to Footnote 9, Related Party Transactions.