Acquisitions (Details) $ in Thousands				1 Months Ended	12 Months Ended
	Jul. 29, 2014 USD ($)	Oct. 31, 2013 USD ($) item	Feb. 22, 2013 USD ($) item	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)
Acquisition
Increase in accumulated deficit					$ 85,176	$ 62,884
Increase (Decrease) the Valuation Allowance for Deferred Tax Assets					19,548	12,470	$ 4,101	$ 1,669
Recognized amounts of identifiable assets acquired and liabilities assumed:
Goodwill					42,403	42,403
Endeka and AWG
Pro forma results
Revenue							114,492
Net loss							(4,945)
AWG
Acquisition
Number of U.S. airports where the acquired entity operates public Wi-Fi | item		17
Amount paid for settlement of the net equity adjustments	$ 147
Contingent consideration paid to AWG shareholders	$ 1,000
Change in Goodwill							(28)
Increase in accrued expenses							147
Increase in accumulated deficit							175
Increase (Decrease) in Deferred Tax Liabilities							(175)
Increase (Decrease) the Valuation Allowance for Deferred Tax Assets							$ 175
Estimated Fair Value
Cash paid		$ 14,800
Net equity adjustments		147
Holdback consideration		1,600
Contingent consideration		980
Total consideration		17,527
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash		215
Restricted cash		515
Accounts receivable		988
Other current assets		609
Property and equipment		2,297
Accounts payable		(563)
Accrued expenses		(515)
Other current liabilities		(134)
Capital lease obligations		(932)
Other non-current liabilities		(130)
Deferred tax liabilities		(3,386)
Net tangible liabilities acquired		(1,036)
Goodwill		9,883
Total purchase price		17,527
Holdback consideration paid					$ 1,600
AWG | Existing contracts and relationships
Recognized amounts of identifiable assets acquired and liabilities assumed:
Intangibles		$ 4,700
Estimated Useful Life		6 years 8 months 12 days
AWG | Technology
Recognized amounts of identifiable assets acquired and liabilities assumed:
Intangibles		$ 270
Estimated Useful Life		6 years
AWG | Trademark and tradename
Recognized amounts of identifiable assets acquired and liabilities assumed:
Intangibles		$ 120
Estimated Useful Life		3 years
AWG | Non-compete agreement
Recognized amounts of identifiable assets acquired and liabilities assumed:
Intangibles		$ 3,590
Estimated Useful Life		5 years
AWG | Identifiable intangible assets
Acquisition
Royalty rates (as a percent)		0.50%
AWG | Identifiable intangible assets | Minimum
Acquisition
Discount rate (as a percent)		12.00%
AWG | Identifiable intangible assets | Maximum
Acquisition
Discount rate (as a percent)		14.00%
AWG | Contingent consideration
Acquisition
Discount rate (as a percent)		3.10%
Endeka Group Inc
Acquisition
Milestone payment made				$ 17
Estimated Fair Value
Cash paid			$ 4,894
Holdback consideration			275
Contingent consideration			1,329
Total consideration			6,498
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash			20
Other current assets			44
Property and equipment			4,617
Other assets			12
Accounts payable			(992)
Other current liabilities			(211)
Notes payable and financed liabilities			(6,476)
Deferred tax liabilities			(2,637)
Net tangible liabilities acquired			(5,623)
Goodwill			5,776
Total purchase price			6,498
Holdback consideration paid						$ 275
Endeka Group Inc | Existing contracts and relationships
Recognized amounts of identifiable assets acquired and liabilities assumed:
Intangibles			$ 4,770
Estimated Useful Life			10 years
Endeka Group Inc | Technology
Recognized amounts of identifiable assets acquired and liabilities assumed:
Intangibles			$ 930
Estimated Useful Life			6 years
Endeka Group Inc | Trademark and tradename
Recognized amounts of identifiable assets acquired and liabilities assumed:
Intangibles			$ 300
Estimated Useful Life			10 years
Endeka Group Inc | Non-compete agreement
Recognized amounts of identifiable assets acquired and liabilities assumed:
Intangibles			$ 250
Estimated Useful Life			2 years
Endeka Group Inc | Other intangibles
Recognized amounts of identifiable assets acquired and liabilities assumed:
Intangibles			$ 95
Estimated Useful Life			10 years
Endeka Group Inc | Identifiable intangible assets | Minimum
Acquisition
Discount rate (as a percent)			40.00%
Royalty rates (as a percent)			0.50%
Endeka Group Inc | Identifiable intangible assets | Maximum
Acquisition
Discount rate (as a percent)			50.00%
Royalty rates (as a percent)			1.50%
Endeka Group Inc | Contingent consideration
Acquisition
Number of components of contingent consideration | item			2
Discount rate (as a percent)			50.50%