Revenue, Deferred Revenue and Prepaid Commissions - Schedule of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 139,025	$ 134,534	$ 142,153
United States
Disaggregation of Revenue [Line Items]
Revenues	135,804	130,380	138,265
International
Disaggregation of Revenue [Line Items]
Revenues	3,221	4,154	3,888
Wireless revenue
Disaggregation of Revenue [Line Items]
Revenues	75,968	75,622	78,826
Paging revenue
Disaggregation of Revenue [Line Items]
Revenues	73,135	73,323	75,845
Product and other revenue
Disaggregation of Revenue [Line Items]
Revenues	2,833	2,299	2,981
Software revenue
Disaggregation of Revenue [Line Items]
Revenues	63,057	58,912	63,327
Operations revenue
Disaggregation of Revenue [Line Items]
Revenues	26,090	21,978	25,345
License
Disaggregation of Revenue [Line Items]
Revenues	8,721	7,202	5,917
Professional services
Disaggregation of Revenue [Line Items]
Revenues	14,694	12,565	17,161
Hardware
Disaggregation of Revenue [Line Items]
Revenues	2,675	2,211	2,267
Maintenance
Disaggregation of Revenue [Line Items]
Revenues	$ 36,967	$ 36,934	$ 37,982