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Share-Based Compensation (Schedule Of Stock-Based Compensation Expense By Statement Of Operations) (Details) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Share-based employee compensation expense $ 190,000us-gaap_AllocatedShareBasedCompensationExpense $ 305,000us-gaap_AllocatedShareBasedCompensationExpense
Cost of product revenue    
Share-based employee compensation expense 4,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= mvis_CostOfProductRevenueMember		 0us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= mvis_CostOfProductRevenueMember
Research and development expense    
Share-based employee compensation expense 47,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember		 114,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_ResearchAndDevelopmentExpenseMember
Sales, marketing, general and administrative expense    
Share-based employee compensation expense $ 139,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= mvis_SalesMarketingGeneralAndAdministrativeExpenseMember		 $ 191,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_IncomeStatementLocationAxis
= mvis_SalesMarketingGeneralAndAdministrativeExpenseMember