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Commitments and Contingencies - Narrative (Details) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 10, 2016 ft²
Commitments and Contingencies Disclosure [Abstract] |  |
Area (square feet) | ft² |  | 41,400
Lease term | 36 months |
Monthly rent expense | $ | $ 0.1 |

X
- Definition Operating Expense, Rent Expense, Monthly + References No definition available. + Details
Name: | mifi_OperatingExpenseRentExpenseMonthly
Namespace Prefix: | mifi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration