Consolidated Financial Statements' Components - Depreciation and Accretion (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Total depreciation	$ 3,451	$ 3,840	$ 2,891
Accretion	697	656	680
Total depreciation and accretion expense	4,148	4,496	3,571
Leasehold improvements
Property, Plant and Equipment [Line Items]
Depreciation	138	87	64
Asset retirement costs
Property, Plant and Equipment [Line Items]
Asset retirement costs	(417)	(261)	(702)
Paging and computer equipment
Property, Plant and Equipment [Line Items]
Depreciation	3,435	3,792	3,289
Furniture, fixtures and vehicles
Property, Plant and Equipment [Line Items]
Depreciation	$ 295	$ 222	$ 240