v3.6.0.2
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