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Description of Business and Summary of Significant Accounting Policies (Details) | 6 Months Ended
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Sep. 30, 2013 item
Description of Business and Basis of Presentation |
Number of divisions | 2
Number of physical locations in which the entity is organized | 4

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- Definition Represents the number of physical locations in which the entity is organized. + References No definition available. + Details
Name: | mlab_NumberOfPhysicalLocationsInWhichEntityIsOrganized
Namespace Prefix: | mlab_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration