Canadian ATG Spectrum License - Additional Information (Detail)			3 Months Ended				3 Months Ended
	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2015 License Agreement [Member] Canadian ATG Spectrum License Agreement [Member] USD ($)	Mar. 31, 2014 License Agreement [Member] Canadian ATG Spectrum License Agreement [Member] USD ($)	Jul. 17, 2012 License Agreement [Member] Canadian ATG Spectrum License Agreement [Member] USD ($)	Jul. 17, 2012 License Agreement [Member] Canadian ATG Spectrum License Agreement [Member] CAD	Mar. 31, 2015 License Agreement [Member] Canadian ATG Spectrum License Agreement [Member] Maximum [Member] USD ($)	Mar. 31, 2014 License Agreement [Member] Canadian ATG Spectrum License Agreement [Member] Maximum [Member] USD ($)
Agreements [Line Items]
Initial term of agreement			10 years
Commencement date of agreement			Aug. 14, 2012
Additional renewal period following the initial expiration			10 years
Renewable period thereafter			5 years
One-time agreement payment					$ 3,300,000	3,300,000
Expiration date of agreement between SkySurf with Industry Canada			Jun. 29, 2019
Monthly payment during the initial term of agreement					100,000	100,000
One-time payment included in prepaid expenses and other current assets			100,000
One-time payment included in other non-current assets	2,197,000	2,417,000	2,197,000
Amortization period of agreement			25 years
Total amortization expenses							100,000	100,000
Total amount of monthly payments incurred			$ 300,000	$ 200,000