v3.26.1
Condensed Consolidated Financial Statements' Components - Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Property, Plant, and Equipment [Line Items]    
Total property and equipment $ 89,258 $ 91,123
Accumulated depreciation (83,907) (85,400)
Total property and equipment, net 5,351 5,723
Leasehold improvements    
Property, Plant, and Equipment [Line Items]    
Total property and equipment 2,759 2,728
Asset retirement costs    
Property, Plant, and Equipment [Line Items]    
Total property and equipment $ 4,212 4,212
Asset retirement costs | Minimum    
Property, Plant, and Equipment [Line Items]    
Useful Life (In Years) 1 year  
Asset retirement costs | Maximum    
Property, Plant, and Equipment [Line Items]    
Useful Life (In Years) 15 years  
Paging and computer equipment    
Property, Plant, and Equipment [Line Items]    
Total property and equipment $ 79,740 81,573
Paging and computer equipment | Minimum    
Property, Plant, and Equipment [Line Items]    
Useful Life (In Years) 1 year  
Paging and computer equipment | Maximum    
Property, Plant, and Equipment [Line Items]    
Useful Life (In Years) 5 years  
Furniture, fixtures and vehicles    
Property, Plant, and Equipment [Line Items]    
Total property and equipment $ 2,547 $ 2,610
Furniture, fixtures and vehicles | Minimum    
Property, Plant, and Equipment [Line Items]    
Useful Life (In Years) 3 years  
Furniture, fixtures and vehicles | Maximum    
Property, Plant, and Equipment [Line Items]    
Useful Life (In Years) 5 years