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Warrants (Summary of Fair Value) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Warrants Summary Of Fair Value Details |  |
Exercise price greater than fair value | $ 0.97 | $ 2.06

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- Definition Exercise price of common stock warrant granted greater than fair value + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: | mvis_
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Period Type: | duration