Summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2015

Summary of significant accounting policies

Schedule of estimated useful lives for property and equipment

Software	2 to 5 years
Computer equipment	2 to 5 years
Furniture, fixtures and office equipment	3 to 5 years
Leasehold improvements	The shorter of the estimated useful life or the remaining term of the agreements, generally ranging from 2 to 15 years

Schedule of weighted average assumptions used to calculate the grant date fair values of employee stock option grants

	December 31,
	2014			2013
Expected term (years)		6.25			6.25
Expected volatility		48.6	%		49.31	%
Risk-free interest rate		1.8	%		1.34	%
Dividend yield		0	%		0	%

Summary of the entity's revenue by primary revenue source

	Year Ended December 31,
	2015		2014		2013
Revenue:
DAS	$	46,455	$	38,259	$	32,681
Retail		31,763		40,336		43,194
Wholesale—Wi-Fi		21,923		15,209		17,261
Military		19,898		4,486		1,260
Advertising and other		19,587		21,007		12,350
Total revenue	$	139,626	$	119,297	$	106,746