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Commitments and Contingencies (Details) (USD $)				1 Months Ended	6 Months Ended
	Sep. 30, 2013	Mar. 31, 2013 item	Sep. 30, 2012	May 31, 2012 Bios	Sep. 30, 2013 Bios	May 15, 2012 Bios
Contingencies
Earn-out period for determination of contingent consideration				3 years
Minimum revenue required in three years subsequent to the acquisition for payment of contingent consideration						$ 22,127,000
Potential undiscounted future payments, low end of range						0
Potential undiscounted future payments, high end of range						6,710,000
Contingent consideration liability	2,164,000	2,140,000	2,140,000		2,140,000
Change in contingent consideration liability					0
Estimate for state sales taxes recorded	$ 1,106,000	$ 100,000
Number of states with estimated sales tax due		1

X

- Definition

Represents the earn-out period over which the revenue growth will be assessed to determine the contingent consideration payable.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

Represents the minimum revenue required in three years subsequent to the acquisition for payment of contingent consideration.

+ References

No definition available.

+ Details

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X

- Definition

The increase (decrease) in the amount of liabilities assumed that arise from contingencies and were recognized by the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	mlab_
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X

- Definition

This element represents the number of states to which the company has an estimated state sales tax due for the reporting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	mlab_
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X

- Details

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X

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479

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X

- Definition

For contingent consideration arrangements and indemnification assets recognized in connection with a business combination, this element represents an estimate of the low-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479

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X

- Definition

The amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and were recognized by the entity.

+ 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 (d)(1)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

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X

- Definition

Carrying value as of the balance sheet date of liabilities incurred through that date and payable for statutory sales and use taxes, including value added tax.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.15(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

-Article 7



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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9

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