Accrued Liabilities - Components of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Accrued compensation and benefits	$ 6,707	$ 7,456
Warranty	2,847	1,842
Acquired customer product liabilities	6,625
Corporate income tax payable	185	453
Contingent consideration amount	1,080	1,174
Accrued satellite network and other equipment	463	497
Accrued inventory purchases	1,246	4,292
OG2 satellite milestone payable	2,655	4,609
Accrued interest expense	4,444	1,031
Accrued professional fees	1,442	876
Accrued airtime charges	991	994
Other accrued expenses	8,525	7,207
Total accrued liabilities	$ 37,210	$ 30,431