v3.20.4

Summary of significant accounting policies - Stock-based compensation (Details) - shares shares in Thousands | 12 Months Ended | 60 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Stock options |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Number of awards made | 0 | 0

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

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AwardTypeAxis=wifi_EmployeeAndNonemployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |