Revenue, Deferred Revenue And Prepaid Commissions - Additional Information and Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) revenue_component	Mar. 31, 2022 USD ($)
Revenues from External Customers and Long-Lived Assets
Total revenue	$ 33,180	$ 33,825
Deferred revenue recognized from previous period	10,000
United States
Revenues from External Customers and Long-Lived Assets
Total revenue	32,210	32,772
International
Revenues from External Customers and Long-Lived Assets
Total revenue	$ 970	1,053
Wireless revenue
Revenues from External Customers and Long-Lived Assets
Revenue primary component | revenue_component	2
Total revenue	$ 19,028	18,846
Paging revenue
Revenues from External Customers and Long-Lived Assets
Total revenue	18,525	18,313
Product and other revenue
Revenues from External Customers and Long-Lived Assets
Total revenue	$ 503	533
Software revenue
Revenues from External Customers and Long-Lived Assets
Revenue primary component | revenue_component	2
Total revenue	$ 14,152	14,979
License
Revenues from External Customers and Long-Lived Assets
Total revenue	1,618	1,824
Professional services
Revenues from External Customers and Long-Lived Assets
Total revenue	3,239	3,336
Hardware
Revenues from External Customers and Long-Lived Assets
Total revenue	356	589
Operations revenue
Revenues from External Customers and Long-Lived Assets
Total revenue	5,213	5,749
Maintenance
Revenues from External Customers and Long-Lived Assets
Total revenue	$ 8,939	$ 9,230