XML 88 R69.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Retirement savings plan (Narrative) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Retirement Savings Plan Narrative Details |  |
401 (k) Employee Maximum Contribution Percentage | 6.00% |
Company matching employee contribution percentage | 50.00% |
Contribution to 401 (k) plan | $ 44,000 | $ 242,000

X
- Definition Company matching employee contribution percentage + References No definition available. + Details
Name: | mvis_CompanyMatchingEmployeeContributionPercentage
Namespace Prefix: | mvis_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition 401 (k) Employee Maximum Contribution Percentage + References No definition available. + Details
Name: | mvis_DefinedBenefitPlanEligibleEmployeeMaximumContributionPercentage
Namespace Prefix: | mvis_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | mvis_RetirementSavingsPlanNarrativeDetailsAbstract
Namespace Prefix: | mvis_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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