XML 30 R71.htm IDEA: XBRL DOCUMENT v3.19.3

Investments - Summary of Contractual Maturities of Investments (Detail) - USD ($) $ in Thousands	Sep. 27, 2019	Sep. 28, 2018
Investments, Debt and Equity Securities [Abstract]
Less than 1 year	$ 75,233
Over 1 year	25,993
Total investments	$ 101,226	$ 98,221

X

- Definition

Available For Sale Debt Securities Maturing In Less Than One Year

+ References

No definition available.

+ Details

Name:	mtsi_AvailableForSaleDebtSecuritiesMaturingInLessThanOneYear
Namespace Prefix:	mtsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Available For Sale Securities Debt Maturities Over One Year Fair Value

+ References

No definition available.

+ Details

Name:	mtsi_AvailableForSaleSecuritiesDebtMaturitiesOverOneYearFairValue
Namespace Prefix:	mtsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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