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Commitments and contingencies (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2014
item
Jan. 01, 2015
Employment contracts    
Number of officers with whom the entity entered into employment contracts 6wifi_NumberOfOfficers  
Other matters    
Number of claims related to venue partners 1wifi_NumberOfInternalAudits  
Minimum    
Other matters    
Reasonably possible loss 0us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Maximum    
Other matters    
Reasonably possible loss 3,000us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Letter of Credit | Silicon Valley Bank ("SVB") Agreement    
Letters of credit    
Amount of Letters of Credit that allows entity to draw 3,315us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= wifi_SiliconValleyBankMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember
 
Term period of Letters of Credit agreements 11 months  
Number of drafts drawn under Letters of Credit 0wifi_NumberOfDraftsDrawn
/ dei_LegalEntityAxis
= wifi_SiliconValleyBankMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember
 
Subsequent Event | Letter of Credit | Silicon Valley Bank ("SVB") Agreement    
Letters of credit    
Increase in borrowing capacity   $ 600wifi_DebtInstrumentIncreaseInBorrowingCapacity
/ dei_LegalEntityAxis
= wifi_SiliconValleyBankMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember