Commitments and Contingencies - Additional Information (Detail) $ in Thousands				1 Months Ended		3 Months Ended		12 Months Ended
	Jul. 14, 2015 USD ($)	Jul. 14, 2014 Satellite	Dec. 21, 2012 USD ($)	Jun. 30, 2015 USD ($)	Apr. 30, 2014 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2001 USD ($)	Apr. 18, 2014 USD ($)	Mar. 20, 2014 USD ($)
Long Term Purchase Commitment [Line Items]
Milestone payments						$ 1,246
In-orbit OG2 Satellites One [Member]
Long Term Purchase Commitment [Line Items]
Non-cash impairment charge				$ 12,748
Removal/decrease in satellite network and other equipment, net				13,788
Accumulated depreciation on equipment				$ 1,040
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
Procurement Agreement [Member]
Long Term Purchase Commitment [Line Items]
Remaining operational milestone payments						5,070
Procurement Agreement [Member] | Airtime [Member] | Europe [Member]
Long Term Purchase Commitment [Line Items]
Credits provided								$ 3,736
Credits used						7	$ 8
Unused credits granted						$ 2,031	$ 2,060
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