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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

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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

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Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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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

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