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Note 4 - Long-Term Debt (Details) - Long-term Debt (Parentheticals) | Dec. 31, 2014
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Line of Credit [Member] |
Note 4 - Long-Term Debt (Details) - Long-term Debt (Parentheticals) [Line Items] |
Line of credit, interest rate at end of period | 1.67%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember
Term Loan [Member] |
Note 4 - Long-Term Debt (Details) - Long-term Debt (Parentheticals) [Line Items] |
Term loan, interest rate at end of period | 2.17%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_CreditFacilityAxis = mlab_TermLoanMember

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- Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | instant

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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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Name: | us-gaap_CreditFacilityAxis=mlab_TermLoanMember
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Data Type: | na
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Period Type: |

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- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
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Balance Type: |
Period Type: |