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v3.20.1

Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Mar. 31, 2020
Notes Tables |
Property, Plant and Equipment, Useful Life [Table Text Block] |
Category |  | Useful Lives |
Buildings (years) |  | 40 |
Manufacturing Equipment (years or less) |  | 7 |
Computer equipment (years or less) |  | 3 |

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- Definition Tabular disclosure of useful life for property, plant and equipment. + References No definition available. + Details
Name: | mlab_PropertyPlantAndEquipmentUsefulLifeTableTextBlock
Namespace Prefix: | mlab_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration