Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands			1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 15, 2016	Jul. 14, 2015	Jun. 30, 2015	Apr. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2001
Long Term Purchase Commitment [Line Items]
Non-cash impairment charge						$ 12,748		$ 12,748
Procurement Agreement [Member] | Airtime [Member] | Europe [Member]
Long Term Purchase Commitment [Line Items]
Credits provided									$ 3,736
Credits used					$ 7	7	$ 14	15
Unused credits granted			$ 2,053		$ 2,023	$ 2,053	$ 2,023	$ 2,053
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
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
Launch Plus One Year In-orbit Insurance Coverage for Five Satellites [Member] | Subsequent Event [Member]
Long Term Purchase Commitment [Line Items]
Extended insurance premium cost for satellites	$ 179
Extended insurance coverage end date	Dec. 21, 2016