Commitments and Contingencies - Additional Information (Detail) $ in Thousands		3 Months Ended
	Aug. 07, 2019 USD ($)	Mar. 31, 2020 USD ($) Position Employee	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Restructuring and related activities, initiation date	Aug. 07, 2019
Restructuring and related activities, description		The Company expects the transition to be substantially completed by the end of the 2020 fiscal year (the “Transition Period”)
Restructuring and related charges, description		The severance payments for these employees were paid in April 2020
Additional Restructuring Charges		$ 300
Restructuring expenses	$ 600	$ 87	$ 0
Number of employees | Employee		9
Lease obligation		$ 4,241
Refund liability related to estimated sales returns		102		$ 147
Warranties		284		444
Warranty Reserves [Member]
Commitments And Contingencies Disclosure [Line Items]
Refund liability related to estimated sales returns		100		100
Warranties		$ 284	$ 384	$ 444	$ 339
Warranty Reserves [Member] | Antenna [Member]
Commitments And Contingencies Disclosure [Line Items]
Repair and replacement warranty		5 years
Tianjin [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of employees | Employee		93
Colorado Office [Member]
Commitments And Contingencies Disclosure [Line Items]
Lease obligation		$ 58
Lease expiration month and year		2020-10
Sublease payments		$ 37
Minimum [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of expected full-time global workforce positions eliminations | Position		30
Maximum [Member]
Commitments And Contingencies Disclosure [Line Items]
Number of expected full-time global workforce positions eliminations | Position		40