v2.4.0.6

Outstanding Shares - Additional Information (Detail)	Dec. 28, 2012	Sep. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding shares of common stock	111,000	131,000

X

- Definition

Number of share under share based compensation excluded from outstanding shares.

+ References

No definition available.

+ Details

Name:	mtsi_NumberOfShareUnderShareBasedCompensationExcludedFromOutstandingShares
Namespace Prefix:	mtsi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration