The percentage points added to the reference rate used to calculate commercial bank floating rate (CBFR).

No definition available.

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Namespace Prefix:	mlab_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the fixed charge coverage ratio required to be maintained by the entity under the terms of debt arrangement.

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
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Period Type:	duration

- Definition

Represents the ratio of funded debt to EBITDA, required to be maintained under the terms of debt arrangements.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The number of quarterly periodic payments on a line of credit facility.

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
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Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ 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 210.5-02.22)

-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 20

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the required periodic payment applied to principal.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Note 4 - Long-Term Debt (Details Textual)		1 Months Ended		6 Months Ended
Note 4 - Long-Term Debt (Details Textual)	Jul. 02, 2015 USD ($)	Oct. 31, 2015 USD ($)	Feb. 29, 2012 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Apr. 30, 2014 USD ($)
Line of Credit [Member] \| Infitrak Acquisition [Member]
Proceeds from Lines of Credit	$ 1,000,000
Line of Credit [Member] \| Minimum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Line of Credit [Member] \| Maximum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Line of Credit [Member] \| Debt Instrument, Variable Rate Base CBFR Using One Month LIBOR [Member]
Debt Instrument, Basis Spread on Variable Rate Used to Calculate Commercial Bank Floating Rate	0.50%
Line of Credit [Member] \| Through March 31, 2016 [Member]
Debt Instrument Covenant, Ratio of Funded Debt to Consolidated EBITDA	3.25
Line of Credit [Member] \| After March 31, 2016 [Member]
Debt Instrument Covenant, Ratio of Funded Debt to Consolidated EBITDA	3
Line of Credit [Member] \| Subsequent Event [Member]
Proceeds from Long-term Lines of Credit		$ 2,000,000
Line of Credit [Member]
Debt Instrument, Term			3 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 50,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Debt Instrument Covenant, Fixed Charge Coverage Ratio	1.35
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 20,000,000
Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,000,000
Initial Term Loan [Member]
Long-term Debt, Gross						$ 15,000,000
Term Loan [Member] \| Infitrak Acquisition [Member]
Proceeds from Issuance of Long-term Debt	$ 8,000,000
Term Loan [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Term Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Term Loan [Member] \| Subsequent Event [Member]
Repayments of Long-term Debt		$ 750,000
Term Loan [Member]
Long-term Debt, Gross	$ 20,000,000
Repayments of Long-term Debt	$ 12,000,000
Line of Credit Facility, Periodic Payment, Number of Quarterly Payments	20
Line of Credit Facility, Periodic Payment, Principal	$ 750,000
Proceeds from Long-term Lines of Credit				$ 22,500,000	$ 18,000,000