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Consolidated Statements of Stockholders' Equity (Parentheticals) (Common Stock [Member])	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Common Stock [Member]
Shares returned as payment for stock options converted	13,021	15,572	12,634

X

- Definition

Represents shares returned as payment for stock options exercised and converted into shares of common stock.

+ References

No definition available.

+ Details

Name:	mlab_StockIssuedDuringPeriodSharesWithheldForPaymentStockOptionsExercised
Namespace Prefix:	mlab_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration