Summary of significant accounting policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Basis of presentation
Decrease in net loss attributable to common stockholders due to certain out-of-period adjustments		$ 217
Business combinations
Transaction costs associated with business combinations	$ 0	$ 192
Concourse Communications Detroit, LLC
Principles of consolidation
Percentage of ownership in subsidiaries	70.00%	70.00%
Chicago Concourse Development Group, LLC
Principles of consolidation
Percentage of ownership in subsidiaries	70.00%	70.00%
Boingo Holding Participacoes Ltda.
Principles of consolidation
Percentage of ownership in subsidiaries	75.00%	75.00%