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Summary of Significant Accounting Policies (Concentration of Sales to Major Customers Narrative) (Details)	12 Months Ended
	Dec. 31, 2012 One Customer	Dec. 31, 2011 Two Customers	Dec. 31, 2011 Three Customers
Sales revenue, major customer, percentage	61.00%	20.00%
Accounts receivable, major customer, percentage	96.00%		53.00%

X

- Definition

Percentage of accounts receivable from external customers that account for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

Name:	mvis_AccountsReceivableMajorCustomerPercentage
Namespace Prefix:	mvis_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

Name:	mvis_SalesRevenueMajorCustomerPercentage
Namespace Prefix:	mvis_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration