Revenues - Schedule of Revenues on Disaggregated Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Revenues	$ 40,862	$ 48,513
Wireless
Disaggregation Of Revenue [Line Items]
Revenues	40,862	48,513
Wireless | License and service fees
Disaggregation Of Revenue [Line Items]
Revenues	3,216	3,807
Wireless | Hosted environment usage fees
Disaggregation Of Revenue [Line Items]
Revenues	2,833	4,852
Wireless | Cloud based usage fees
Disaggregation Of Revenue [Line Items]
Revenues	33,643	38,182
Wireless | Consulting services and other
Disaggregation Of Revenue [Line Items]
Revenues	$ 1,170	$ 1,672