Revenues - Schedule of Revenues on Disaggregated Basis (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation Of Revenue [Line Items]
Revenues	$ 5,798	$ 10,930
Wireless
Disaggregation Of Revenue [Line Items]
Revenues	5,798	10,930
Wireless | License and service fees
Disaggregation Of Revenue [Line Items]
Revenues	777	1,000
Wireless | Hosted environment usage fees
Disaggregation Of Revenue [Line Items]
Revenues	665	819
Wireless | Cloud based usage fees
Disaggregation Of Revenue [Line Items]
Revenues	4,025	8,677
Wireless | Consulting services and other
Disaggregation Of Revenue [Line Items]
Revenues	$ 331	$ 434