Satellite Network and Other Equipment - Additional Information (Detail) $ in Thousands					3 Months Ended				12 Months Ended
	Mar. 01, 2016 USD ($)	Dec. 21, 2015 Satellite	Sep. 15, 2014 USD ($)	Jul. 14, 2014 Satellite	Sep. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Property Plant And Equipment [Line Items]
Depreciation and amortization expense									$ 42,803	$ 26,571	$ 10,856
Impairment charges - satellite network									10,680	12,748	605
Internal-use Software [Member]
Property Plant And Equipment [Line Items]
Company capitalized costs attributable to the design and development of internal-use software									4,494	4,958	2,777
Amortization of internal-use software									3,545	1,733	969
Fixed Assets [Member]
Property Plant And Equipment [Line Items]
Depreciation and amortization expense									$ 30,465	$ 15,371	8,061
Depreciation and amortization expense percentage related to cost of services									69.00%	68.00%
Depreciation and amortization expense percentage related to cost of product sales									10.00%	11.00%
Satellite Network [Member]
Property Plant And Equipment [Line Items]
Removal/decrease in satellite network and other equipment, net						$ 2,374		$ 137	$ 137		1,477
Impairment loss on asset						466					605
Accumulated depreciation on equipment						$ 1,908					872
Satellites, life in years									10 years
OG2 Satellite Impairment [Member]
Property Plant And Equipment [Line Items]
Removal/decrease in satellite network and other equipment, net					$ 13,474		$ 13,788		$ 13,474
Impairment charges - satellite network					10,680		12,748
Accumulated depreciation on equipment					2,794		1,040		2,794
OG2 Satellites [Member]
Property Plant And Equipment [Line Items]
Impairment loss on asset					$ 10,680		$ 12,748
Number of satellites | Satellite		11
Reclassification of costs out of assets under construction into satellite network	$ 137,772
Satellites, life in years	10 years
OG2 Satellites Constellation [Member]
Property Plant And Equipment [Line Items]
Depreciation									$ 18,376	$ 6,957	$ 2,431
Next-generation OG2 Satellites [Member]
Property Plant And Equipment [Line Items]
Number of satellites | Satellite				6
Reclassification of costs out of assets under construction into satellite network			$ 82,725
Satellites, life in years			10 years