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Sale-Leaseback Transaction - Amendments (Details) - USD ($)
6 Months Ended
Oct. 17, 2025
Jun. 30, 2026
Dec. 31, 2025
Dec. 31, 2024
Sale-Leaseback Transaction        
Operating right-of-use assets     $ 10,253,000 $ 6,938,000
Lease liabilities     5,393,000 $ 7,300,000
Antenna site lease agreement        
Sale-Leaseback Transaction        
Total purchase price $ 10,700,000      
Operating right-of-use assets 5,244,000   $ 5,190,000  
Lease liabilities $ 0      
Antenna site lease agreement | Subsequent Events        
Sale-Leaseback Transaction        
Total purchase price   $ 15,900,000    
Upfront payment   10,700,000    
Promissory Notes   $ 5,200,000    
Lease term   25 years    
De-recognition of prepaid rent   $ 5,200,000    
Interest rate of notes receivable   9.30%