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Retirement savings plan (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Retirement Savings Plan Narrative Details
Contribution to 401 (k) plan	$ 108,000	$ 0	$ 0

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- References

No definition available.

+ Details

Name:	MVIS_RetirementSavingsPlanNarrativeDetailsAbstract
Namespace Prefix:	MVIS_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration