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Summary of Significant Accounting Policies (Concentration of Sales to Major Customers Narrative) (Details) | 12 Months Ended |
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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