Revenues - Schedule of Revenues on Disaggregated Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Revenues	$ 48,513	$ 58,422
Wireless
Disaggregation Of Revenue [Line Items]
Revenues	48,513	58,422
Wireless | License and service fees
Disaggregation Of Revenue [Line Items]
Revenues	3,807	3,730
Wireless | Hosted environment usage fees
Disaggregation Of Revenue [Line Items]
Revenues	4,852	13,770
Wireless | Cloud based usage fees
Disaggregation Of Revenue [Line Items]
Revenues	38,182	38,415
Wireless | Consulting services and other
Disaggregation Of Revenue [Line Items]
Revenues	$ 1,672	$ 2,507