Accrued Liabilities - Components of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Accrued compensation and benefits	$ 8,920	$ 7,456
Warranty	2,239	1,842
Corporate income tax payable	499	453
Contingent consideration amount	680	1,174
Accrued satellite network and other equipment	708	497
Accrued inventory purchases	919	4,292
OG2 satellite milestone payable	4,609	4,609
Accrued interest expense	1,009	1,031
Accrued financing fees	4,994
Accrued airtime charges	982	994
Other accrued expenses	7,119	8,083
Total accrued liabilities	$ 32,678	$ 30,431