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v3.19.3

Product Warranties - Additional Information (Detail) | 12 Months Ended
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Sep. 27, 2019
Guarantees [Abstract] |
Term of product warranties | 12 months

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- Definition Products warranty period. + References No definition available. + Details
Name: | mtsi_ProductsWarrantyPeriod
Namespace Prefix: | mtsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_GuaranteesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration