Accrued Liabilities - Components of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Accrued compensation and benefits	$ 7,146	$ 9,367
Accrued warranty obligations	5,823	5,624
Acquired customer product liabilities	546	546
Corporate income tax payable	1,153	1,521
Contingent consideration amount		2,063
VAT payable	2,928	2,286
Accrued satellite network and other equipment	283	227
Accrued inventory purchases	815	219
Accrued interest expense	10,000	5,000
Accrued professional fees	218	303
Accrued airtime charges	1,794	901
Short-term lease liability	2,998
Other accrued expenses	6,866	7,678
Total accrued liabilities	$ 40,570	$ 35,735