Consolidated Financial Statements' Components - Depreciation and Accretion (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Property, Plant and Equipment [Line Items]
Total depreciation	$ 892	$ 1,101	$ 1,786	$ 2,173
Accretion	175	164	349	328
Total depreciation and accretion expense	1,067	1,265	2,135	2,501
Leasehold improvements
Property, Plant and Equipment [Line Items]
Depreciation	39	14	75	27
Asset retirement costs
Property, Plant and Equipment [Line Items]
Asset retirement costs	(104)	64	208	130
Paging and computer equipment
Property, Plant and Equipment [Line Items]
Depreciation	877	967	1,778	1,905
Furniture, fixtures and vehicles
Property, Plant and Equipment [Line Items]
Depreciation	$ 80	$ 56	$ 141	$ 111