Consolidated Financial Statements' Components - Depreciation and Accretion (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Total depreciation	$ 901	$ 1,103	$ 2,687	$ 3,276
Accretion	174	164	523	492
Total depreciation and accretion expense	1,075	1,267	3,210	3,768
Leasehold improvements
Property, Plant and Equipment [Line Items]
Depreciation	46	24	121	51
Asset retirement costs
Property, Plant and Equipment [Line Items]
Asset retirement costs	(104)	66	(312)	196
Paging and computer equipment
Property, Plant and Equipment [Line Items]
Depreciation	869	959	2,647	2,864
Furniture, fixtures and vehicles
Property, Plant and Equipment [Line Items]
Depreciation	$ 90	$ 54	$ 231	$ 165