XML 73 R53.htm IDEA: XBRL DOCUMENT v3.21.2

Income Taxes (Details 6) $ in Thousands	12 Months Ended
	Jun. 30, 2021 USD ($)
Foreign tax credit carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Description	June 2023 to June 2025
Tax Credit Carryforward, Amount	$ 655
State and Local Jurisdiction [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Description	June 2033 to indefinite
Tax Credit Carryforward, Amount	$ 578
Federal tax credits
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Description	June 2041
Tax Credit Carryforward, Amount	$ 1,087
Foreign tax credit carryforwards
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Description	June 2035 to June 2041
Tax Credit Carryforward, Amount	$ 687

X

- Definition

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319

+ Details

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

X

- Definition

A description of the origin, nature, and characteristics of the tax credit carryforward.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	mtrx_IncomeTaxAuthorityDescriptionAxis=mtrx_FederalForeignTaxCreditCarryforwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	mtrx_IncomeTaxAuthorityDescriptionAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	mtrx_IncomeTaxAuthorityDescriptionAxis=mtrx_FederalTaxCreditCarryforwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	mtrx_IncomeTaxAuthorityDescriptionAxis=mtrx_ForeignTaxCreditCarryforwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: