Commitments and Contingencies - Additional Information (Detail) $ in Thousands	1 Months Ended	9 Months Ended
	Nov. 30, 2021 USD ($) Employee	Sep. 30, 2022 USD ($) Employee	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Restructuring expenses		$ 1,309
Payments for restructuring		1,677
Refund liability		301	$ 248
Warranties		309	257	$ 272		$ 285
Warranty Reserves [Member]
Commitments And Contingencies Disclosure [Line Items]
Refund liability		300	$ 200
Warranties		$ 300			$ 300
Warranty Reserves [Member] | Antenna [Member]
Commitments And Contingencies Disclosure [Line Items]
Repair and replacement warranty		5 years
Beijing Restructuring [Member]
Commitments And Contingencies Disclosure [Line Items]
Restructuring expenses		$ 0
Payments for restructuring		368
Beijing Restructuring [Member] | Antenna [Member]
Commitments And Contingencies Disclosure [Line Items]
Restructuring expenses	$ 800
Number of employees separation | Employee	14
Number of former employees rehired | Employee	4
Employee Severance [Member] | Beijing Restructuring [Member] | Antenna [Member]
Commitments And Contingencies Disclosure [Line Items]
Payments for restructuring		400
Tianjin [Member]
Commitments And Contingencies Disclosure [Line Items]
Restructuring expenses		1,300
Tianjin [Member] | Employee Severance [Member]
Commitments And Contingencies Disclosure [Line Items]
Restructuring expenses		$ 1,200
Number of employees separation | Employee		78
Tianjin [Member] | Fixed Assets and Facilities [Member]
Commitments And Contingencies Disclosure [Line Items]
Restructuring expenses		$ 100