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Note 11 - Fair Value Measurements (Details Textual)	Sep. 30, 2016
Infitrak Acquisition [Member] | Scenario, Forecast [Member]
Business Combination, Contingent Consideration, Payment Installments	2

X

- Definition

Number of installments in which contingent consideration related to a business combination is payable in.

+ References

No definition available.

+ Details

Name:	mlab_BusinessCombinationContingentConsiderationPaymentInstallments
Namespace Prefix:	mlab_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=mlab_InfitrakAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: