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Note 2 - Acquisitions Dispositions (Details) - Purchase Price Allocation - PCD (USD $) | 9 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 | Mar. 31, 2014 | Oct. 15, 2014
Note 2 - Acquisitions Dispositions (Details) - Purchase Price Allocation - PCD [Line Items] |  |  |
Contingent consideration liability | $ 1,920,000 us-gaap_BusinessCombinationContingentConsiderationLiability | $ 1,620,000 us-gaap_BusinessCombinationContingentConsiderationLiability |
Goodwill | 44,097,000 us-gaap_Goodwill | 37,866,000 us-gaap_Goodwill |
PCD Acquisition [Member] |  |  |
Note 2 - Acquisitions Dispositions (Details) - Purchase Price Allocation - PCD [Line Items] |  |  |
Cash consideration | 5,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  |
Holdback payment liability | 250,000 mlab_BusinessCombinationHoldBackConsiderationLiability / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  |
Contingent consideration liability | 300,000 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  | 300,000 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember
Aggregate consideration | 5,550,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  |
Inventories, net | 137,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  |
Property, plant and equipment, net | 7,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  |
Intangibles, net | 3,678,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  |
Goodwill | 1,743,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  |
Accrued expenses | (15,000)mlab_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedExpenses / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  |
Total purchase price allocation | $ 5,550,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = mlab_PCDAcquisitionMember |  |

X
- Definition Amount of hold back liability recognized arising from a business combination. + References No definition available. + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 + Details
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