Summary of significant accounting policies - Segment and geographic information (Details) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2016
USD ($)
|
Sep. 30, 2016
USD ($)
|
Jun. 30, 2016
USD ($)
|
Mar. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
Sep. 30, 2015
USD ($)
|
Jun. 30, 2015
USD ($)
|
Mar. 31, 2015
USD ($)
|
Dec. 31, 2016
USD ($)
segment
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
| Primary revenue source | |||||||||||
| Number of reportable segments | segment | 1 | ||||||||||
| Revenue | $ 44,974 | $ 40,796 | $ 39,075 | $ 34,499 | $ 38,771 | $ 37,186 | $ 34,277 | $ 29,392 | $ 159,344 | $ 139,626 | $ 119,297 |
| DAS | |||||||||||
| Primary revenue source | |||||||||||
| Revenue | 58,182 | 46,455 | 38,259 | ||||||||
| Military | |||||||||||
| Primary revenue source | |||||||||||
| Revenue | 39,975 | 19,898 | 4,486 | ||||||||
| Retail | |||||||||||
| Primary revenue source | |||||||||||
| Revenue | 26,636 | 31,763 | 40,336 | ||||||||
| Wholesale-Wi-Fi | |||||||||||
| Primary revenue source | |||||||||||
| Revenue | 22,221 | 21,923 | 15,209 | ||||||||
| Advertising and other | |||||||||||
| Primary revenue source | |||||||||||
| Revenue | $ 12,330 | $ 19,587 | $ 21,007 | ||||||||