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Goodwill (Details 1) $ in Millions	3 Months Ended
Goodwill (Details 1) $ in Millions	Mar. 27, 2020 USD ($)
Goodwill Disclosure [Abstract]
Impairment charges	$ 20.6

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- Definition

Goodwill Disclosure [Abstract]

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No definition available.

+ Details

Name:	mtrn_GoodwillDisclosureAbstract
Namespace Prefix:	mtrn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Total Impairment Charges to date

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No definition available.

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Name:	mtrn_TotalImpairmentCharges
Namespace Prefix:	mtrn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration