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Description of Business and Summary of Significant Accounting Policies (Details)	6 Months Ended
	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

X

- 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

X

- Details

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