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Warrants Outstanding and Exercisable (Details) (USD $) | Dec. 31, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Warrant, exercise price | $ 3.08us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | $ 2.47us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | $ 3.07us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | $ 7.28us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Warrants, Outstanding as of end of period | 6,526,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 2,100,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 8,091,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 5,131,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Warrants, Exercisable at end of period | 6,526,000mvis_WarrantsExercisableAtEndOfPeriod |  |  |
Warrants exercisable, weighted average exercise price |  |  | $ 3.08mvis_WarrantsWeightedaverageExercisePriceExercisable |
2.13 |  |  |  |
Warrant, exercise price | $ 2.13us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceOneMember |  |  |
Warrants, Outstanding as of end of period | 1,000,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceOneMember |  |  |
Warrants outstanding, weighted average remaining contractual life, years | $ 0.39mvis_WarrantsOutstandingWeightedAverageRemainingContractualLifeYears / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceOneMember |  |  |
Warrants outstanding, weighted average exercise price | $ 2.13mvis_WarrantsOutstandingWeightedAverageExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceOneMember |  |  |
Warrants, Exercisable at end of period | 1,000,000mvis_WarrantsExercisableAtEndOfPeriod / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceOneMember |  |  |
Warrants exercisable, weighted average exercise price | $ 2.13mvis_WarrantsWeightedaverageExercisePriceExercisable / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceOneMember |  |  |
2.24 |  |  |  |
Warrant, exercise price | $ 2.24us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceTwoMember |  |  |
Warrants, Outstanding as of end of period | 2,100,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceTwoMember |  |  |
Warrants outstanding, weighted average remaining contractual life, years | $ 2.47mvis_WarrantsOutstandingWeightedAverageRemainingContractualLifeYears / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceTwoMember |  |  |
Warrants outstanding, weighted average exercise price | $ 2.24mvis_WarrantsOutstandingWeightedAverageExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceTwoMember |  |  |
Warrants, Exercisable at end of period | 2,100,000mvis_WarrantsExercisableAtEndOfPeriod / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceTwoMember |  |  |
Warrants exercisable, weighted average exercise price | $ 2.24mvis_WarrantsWeightedaverageExercisePriceExercisable / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceTwoMember |  |  |
2.47 |  |  |  |
Warrant, exercise price | $ 2.47us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceThreeMember |  |  |
Warrants, Outstanding as of end of period | 2,148,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceThreeMember |  |  |
Warrants outstanding, weighted average remaining contractual life, years | $ 4.21mvis_WarrantsOutstandingWeightedAverageRemainingContractualLifeYears / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceThreeMember |  |  |
Warrants outstanding, weighted average exercise price | $ 2.47mvis_WarrantsOutstandingWeightedAverageExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceThreeMember |  |  |
Warrants, Exercisable at end of period | 2,148,000mvis_WarrantsExercisableAtEndOfPeriod / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceThreeMember |  |  |
Warrants exercisable, weighted average exercise price | $ 2.47mvis_WarrantsWeightedaverageExercisePriceExercisable / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceThreeMember |  |  |
6.24 |  |  |  |
Warrant, exercise price | $ 6.24us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceFiveMember |  |  |
Warrants, Outstanding as of end of period | 1,278,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceFiveMember |  |  |
Warrants outstanding, weighted average remaining contractual life, years | $ 1.88mvis_WarrantsOutstandingWeightedAverageRemainingContractualLifeYears / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceFiveMember |  |  |
Warrants outstanding, weighted average exercise price | $ 6.24mvis_WarrantsOutstandingWeightedAverageExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceFiveMember |  |  |
Warrants, Exercisable at end of period | 1,278,000mvis_WarrantsExercisableAtEndOfPeriod / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceFiveMember |  |  |
Warrants exercisable, weighted average exercise price | $ 6.24mvis_WarrantsWeightedaverageExercisePriceExercisable / us-gaap_ClassOfWarrantOrRightAxis = mvis_PriceFiveMember |  |  |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 2 -Article 4 + Details
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