Organization and Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) account	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items]
Deferred revenue	$ 26,298,000	$ 27,255,000
Commissions expense	4,500,000	4,000,000	$ 4,400,000
Impairment of goodwill	0	0	0
Impairment of intangible assets	0	0	0
Capitalized software development impairment	$ 0	0	15,663,000
Number of significant allowance accounts | account	2
Contractor fee, annual percentage increase	3.00%
Valuation allowance, deferred tax asset, increase (decrease), amount		(21,900,000)
Valuation allowance	$ 2,328,000	2,328,000
Uncertain tax positions	0	0
Advertising expenses	700,000	1,000,000	1,400,000
Provisions for doubtful accounts, service credits and other	$ 300,000	1,200,000	$ 700,000
Adjustments
Property, Plant and Equipment [Line Items]
Deferred revenue		$ 1,000,000
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Useful life	3 years
Minimum
Property, Plant and Equipment [Line Items]
Useful life	1 year
Minimum | Paging Equipment Assets
Property, Plant and Equipment [Line Items]
Useful life	1 year
Maximum
Property, Plant and Equipment [Line Items]
Useful life	5 years
Maximum | Paging Equipment Assets
Property, Plant and Equipment [Line Items]
Useful life	5 years
Customer Relationships
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	10 years	10 years