Consolidated Financial Statement Components - Depreciation, Amortization and Accretion (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Property, Plant and Equipment [Line Items]
Total depreciation	$ 1,101	$ 701	$ 2,173	$ 1,465
Accretion	164	170	328	340
Depreciation and accretion	1,265	871	2,501	1,805
Leasehold improvements
Property, Plant and Equipment [Line Items]
Depreciation	14	16	27	35
Asset retirement costs
Property, Plant and Equipment [Line Items]
Asset retirement costs	64	(175)	130	(350)
Paging and computer equipment
Property, Plant and Equipment [Line Items]
Depreciation	967	800	1,905	1,650
Furniture, fixtures and vehicles
Property, Plant and Equipment [Line Items]
Depreciation	$ 56	$ 60	$ 111	$ 130