Note 3 - Fair Value Measurements and Concentrations of Credit Risk (Details Textual) Pure in Thousands	9 Months Ended
Dec. 31, 2025
Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Number of Major Customers	0

Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.

No definition available.

Name:	mlab_NumberOfMajorCustomers
Namespace Prefix:	mlab_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration