v3.8.0.1

Summary of significant accounting policies - Revenue recognition (Details)	12 Months Ended
	Dec. 31, 2017
DAS license agreements | Minimum
Revenue recognition
Initial term of the arrangement	5 years
DAS license agreements | Maximum
Revenue recognition
Initial term of the arrangement	20 years
Wholesale-Wi-Fi | Minimum
Revenue recognition
Initial term of the arrangement	1 year
Wholesale-Wi-Fi | Maximum
Revenue recognition
Initial term of the arrangement	3 years

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RevenueRecognitionMultipleDeliverableArrangementsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the term of the arrangement that is used as a basis for recognizing certain revenues.

+ References

No definition available.

+ Details

Name:	wifi_RevenueRecognitionPeriod
Namespace Prefix:	wifi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ProductOrServiceAxis=wifi_DasPartnerArrangementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=wifi_WholesalePartnerArrangementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: