Commitments and Contingencies - Additional Information (Detail) $ in Thousands				1 Months Ended			3 Months Ended	12 Months Ended
	Jul. 14, 2015 USD ($)	Jul. 14, 2014 Satellite	Dec. 21, 2012 USD ($)	Jan. 31, 2016 USD ($)	Jun. 30, 2015 USD ($)	Apr. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2001 USD ($)	Apr. 18, 2014 USD ($)	Mar. 20, 2014 USD ($)
Long Term Purchase Commitment [Line Items]
Non-cash impairment charge							$ 12,748	$ 12,748	$ 605
Lease payment and rent expense								2,692	2,384	$ 2,554
In-orbit OG2 Satellites One [Member]
Long Term Purchase Commitment [Line Items]
Non-cash impairment charge					$ 12,748		$ 12,748
Removal/decrease in satellite network and other equipment					13,788			13,788
Accumulated depreciation on equipment					$ 1,040			1,040
Subsequent Event [Member]
Long Term Purchase Commitment [Line Items]
Milestone payments				$ 1,246
Second Amendment [Member]
Long Term Purchase Commitment [Line Items]
Procurement agreement contract price excluding optional satellites													$ 117,000
Falcon Nine Agreement [Member]
Long Term Purchase Commitment [Line Items]
Contract price			$ 42,600
OG2 Satellite Procurement [Member]
Long Term Purchase Commitment [Line Items]
Number of satellites | Satellite		6
Carrier Data Providers [Member]
Long Term Purchase Commitment [Line Items]
Future minimum payments for the year, 2016								6,854
Future minimum payments for the year, 2017								7,424
Future minimum payments for the year, 2018								5,814
Future minimum payments for the year, 2019								3,761
Future minimum payments for the year, 2020								3,761
Vendor Parts Supplier [Member]
Long Term Purchase Commitment [Line Items]
Future minimum payments for the year, 2016								520
Future minimum payments for the year, 2017								1,017
Future minimum payments for the year, 2018								1,950
Future minimum payments for the year, 2019								1,058
Procurement Agreement [Member]
Long Term Purchase Commitment [Line Items]
Remaining operational milestone payments								8,255
Unused credits granted								2,038	2,067
Procurement Agreement [Member] | Airtime [Member]
Long Term Purchase Commitment [Line Items]
Credits provided								$ 29	$ 30	$ 31
Procurement Agreement [Member] | Airtime [Member] | Europe [Member]
Long Term Purchase Commitment [Line Items]
Credits provided											$ 3,736
Procurement Agreement [Member] | Subsequent Event [Member]
Long Term Purchase Commitment [Line Items]
Milestone payments				$ 3,185
Procurement Agreement Five Additional Task Order [Member]
Long Term Purchase Commitment [Line Items]
Procurement agreement fixed price contract amount												$ 2,700
Launch Plus One Year In Orbit Insurance Coverage for First Launch of Six Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program						$ 66,000
Launch Vehicle Flight Only Insurance Coverage for First Launch of Six Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program						22,000
First Launch of Six Satellites [Member]
Long Term Purchase Commitment [Line Items]
Premium cost for launch of satellite						9,953
Launch Plus One Year In Orbit Insurance Coverage for Second Launch of Eleven Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program						120,000
Launch Vehicle Flight Only Insurance Coverage for Second Launch of Eleven Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program						22,000
Second Launch of Eleven Satellites [Member]
Long Term Purchase Commitment [Line Items]
Premium cost for launch of satellite						$ 16,454
Percentage of premium as to aggregate premium						5.00%
Launch Plus One Year In-orbit Insurance Coverage for Five Satellites [Member]
Long Term Purchase Commitment [Line Items]
Insurance coverage on launch of satellite program	$ 40,000