v3.3.1.900

Summary of significant accounting policies (Details) - USD ($) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 04, 2015 | Dec. 31, 2015 | Dec. 31, 2013 | Aug. 03, 2015 | Dec. 31, 2014
Principles of consolidation |  |  |  |  |
Reduction to additional paid-in capital resulting from purchase of remaining noncontrolling interest |  | $ 1,150 |  |  |
Basis of presentation |  |  |  |  |
Noncurrent deferred tax liabilities |  | $ (2,965) |  |  | $ (2,645)
Decrease in net loss attributable to common stockholders due to certain out-of-period adjustments |  |  | $ 217 |  |
ASU 2015-17 | Early adoption |  |  |  |  |
Basis of presentation |  |  |  |  |
Current deferred tax assets |  |  |  |  | 787
Noncurrent deferred tax liabilities |  |  |  |  | $ 787
Concourse Communications Detroit, LLC |  |  |  |  |
Principles of consolidation |  |  |  |  |
Percentage of additional ownership in Subsidiary acquired | 30.00% |  |  |  |
Total purchase price | $ 1,150 |  |  |  |
Reduction to additional paid-in capital resulting from purchase of remaining noncontrolling interest | $ 1,150 |  |  |  |
Chicago Concourse Development Group, LLC |  |  |  |  |
Principles of consolidation |  |  |  |  |
Percentage of ownership in subsidiaries |  | 70.00% |  |  |
Boingo Holding Participacoes Ltda. |  |  |  |  |
Principles of consolidation |  |  |  |  |
Percentage of ownership in subsidiaries |  | 75.00% |  |  |
Concourse Communications Detroit, LLC |  |  |  |  |
Principles of consolidation |  |  |  |  |
Percentage of ownership in subsidiaries |  |  |  | 70.00% |

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