Consolidated Financial Statements' Components - Depreciation and Accretion (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Property, Plant and Equipment [Line Items]
Total depreciation	$ 894	$ 1,072
Accretion	174	164
Total depreciation and accretion expense	1,068	1,236
Leasehold improvements
Property, Plant and Equipment [Line Items]
Depreciation	36	13
Asset retirement costs
Property, Plant and Equipment [Line Items]
Asset retirement costs	(104)	66
Paging and computer equipment
Property, Plant and Equipment [Line Items]
Depreciation	901	938
Furniture, fixtures and vehicles
Property, Plant and Equipment [Line Items]
Depreciation	$ 61	$ 55