Accrued Liabilities - Components of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Payables And Accruals [Abstract]
Accrued compensation and benefits	$ 6,833	$ 9,486
Accrued warranty obligations	6,754	6,398
Corporate income tax payable	263	386
Accrued VAT payable	3,068	2,189
Accrued satellite network and other equipment	669	591
Accrued inventory purchases	905	298
Accrued professional fees	895	393
Accrued airtime charges	493	812
Short-term lease liability	2,733	2,736
Other accrued expenses	7,743	8,618
Total accrued liabilities	$ 30,356	$ 31,907