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COMMON STOCK AND STOCK-BASED COMPENSATION (Details) | 1 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2014 | Jan. 31, 2015
2010 Stock Plan | Stock options |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Annual award vesting percentage | 33.30%mei_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardAnnualVestingPercentage / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = mei_TwoThousandTenStockPlanMember |
Granted (in shares) | 108,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = mei_TwoThousandTenStockPlanMember |
Award expiration period | 10 years |
2007 Stock Plan | Stock options |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Annual award vesting percentage | 33.30%mei_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardAnnualVestingPercentage / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = mei_TwoThousandSevenStockPlanMember |
Granted (in shares) | 50,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = mei_TwoThousandSevenStockPlanMember |
Award expiration period | 10 years |
2007 Stock Plan | Restricted Stock Awards (RSA's) |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Awarded (in shares) |  | 13,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = mei_TwoThousandSevenStockPlanMember
2014 Stock Plan [Member] | Restricted Stock Awards (RSA's) |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Awarded (in shares) |  | 13,500 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = mei_A2014StockPlanMember

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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