Repayment of principal portion of long-term liability
Repayments of Other Debt
Entity Voluntary Filers
Entity Voluntary Filers
Joint Pension Fund Local Union Number 102 IBEW [Member] [Domain]
Joint Pension Fund Local Union Number One Zero Two [Member] [Domain]
[Domain] for Joint Pension Fund Local Union Number One Zero Two
SM Electric Trade Name [Member]
SM Electric Trade Name [Member]
SM Electric Trade Name [Member]
Boilermaker-Blacksmith National Pension Trust [Member]
Boilermaker Blacksmith National Pension Trust [Member]
Boilermaker blacksmith national pension trust.
Range [Domain]
Statistical Measurement [Domain]
ABL Facility Maximum Capacity
Line of Credit Facility, Maximum Borrowing Capacity
Changes in operating assets and liabilities increasing (decreasing) cash:
Increase (Decrease) in Operating Capital [Abstract]
Common stock grant expiration term
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period
Award Type [Domain]
Award Type [Domain]
Nonvested shares at June 30, 2022
Nonvested shares at June 30, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Line of Credit Facility, Interest Rate at Period End
Line of Credit Facility, Interest Rate at Period End
Debt
Debt Disclosure [Text Block]
Expiration Date of Collective-Bargaining Agreement
Multiemployer Plan, Pension, Significant, Collective-Bargaining Arrangement, Expiration Date
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Restructuring reserve
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Restructuring Charges
Impairment of Intangible Assets, Finite-lived
Impairment of Intangible Assets, Finite-Lived
Deferred income taxes
Deferred income tax liabilities
Deferred Income Tax Liabilities, Net
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Accounts payable
Accounts Payable, Current
Customer Three [Member]
Customer Three [Member]
Customer three.
Foreign currency translation adjustments, tax effect
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Commitments and contingencies
Commitments and Contingencies
Other intangible asset impairments
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract]
Number of options exercisable at June 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Method Used
Construction in progress
Construction in Progress, Gross
Operating lease, fixed asset, and other intangible asset impairments due to restructuring (Note 14)
Other Asset Impairment Charges
Number of unions contributed to
Number of unions contributed to
Number of unions contributed to
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Fiscal 2028
Lessee, Operating Lease, Liability, to be Paid, Year Five
Income Tax Authority, Description [Axis]
Income Tax Authority, Description [Axis]
Income Tax Authority: State, Federal and Foreign
Stockholders' Equity
Equity [Text Block]
Aggregate intrinsic value vested or expected to be vest at June 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Proceeds from Issuance of Common Stock
Proceeds from Issuance of Common Stock
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Geographical [Axis]
Geographical [Axis]
Proceeds from issuance of common stock under employee stock purchase plan
Proceeds from Stock Plans
Income Taxes
Income Tax Disclosure [Text Block]
Billings on uncompleted contracts in excess of costs and estimated earnings
Increase (Decrease) in Contract with Customer, Liability
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
Expected dividend yield
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate
IBEW Local 98 Pension Plan
IBEW Local 98 Pension Plan [Member]
IBEW Local 98 Pension Plan
Federal rate differential net operating loss carryback
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount
Storage and Terminal Solutions Segment
mtrx:StorageandTerminalSolutionsSegment
Storage and Terminal Solutions Segment
Matrix Service Company's 2004 Stock and Incentive Compensation Plan [Member]
Matrix Service Company's 2004 Stock and Incentive Compensation Plan [Member]
Matrix Service Company's 2004 Stock and Incentive Compensation Plan (2004 Plan) [Member]
Leases
Lessee, Leases [Policy Text Block]
Surcharge Imposed
Multiemployer Plan, Pension, Significant, Surcharge [Fixed List]
Revenue Recognition
Revenue [Policy Text Block]
Major Customers [Axis]
Customer [Axis]
Current liabilities:
Liabilities, Current [Abstract]
Income Tax Authority, Description [Domain]
Income Tax Authority, Description [Domain]
[Domain] for Income Tax Authority: State, Federal and Foreign
Federal
Deferred Federal Income Tax Expense (Benefit)
Multiemployer Plan Zone By Type [Domain]
Multiemployer Plan Zone By Type [Domain]
Multiemployer plan zone by type.
Tax Credit Carryforward, Description
Tax Credit Carryforward, Description
Change in valuation allowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
Intersegment Eliminations [Member]
Intersegment Eliminations [Member]
Proceeds from Divestiture of Businesses
Proceeds from Divestiture of Businesses
Storage and Terminal Solutions
Storage and Terminal Solutions Segment [Member]
Storage and Terminal Solutions Segment
Diluted loss per common share
Diluted loss per common share (in dollars per share)
Earnings Per Share, Diluted
Type of Deferred Compensation [Axis]
Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis]
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Other Intangible Assets
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]
Treasury stock, at cost — 840,899 and 1,097,703 shares as of June 30, 2023 and June 30, 2022, respectively
Treasury Stock, Value
Accounts receivable, less allowances (2023 - $1,061; 2022 - $1,320)
Accounts Receivable, after Allowance for Credit Loss, Current
Carrying value of goodwill by segment
Goodwill [Roll Forward]
Restricted Stock Award, Forfeitures
Restricted Stock Award, Forfeitures
Share based compensation arrangement by share based payment award deferred cancellations in period.
Share based compensation arrangement by share based payment award deferred cancellations in period.
Share based compensation arrangement by share based payment award deferred cancellations in period.
Weighted average exercise price vested or expected to vest at June 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price
Accounts Receivable Reserve - Increase
Accounts Receivable Reserve - Increase
Accounts Receivable Reserve - Increase
Vesting period of director awards
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period of Director Awards
Share based compensation arrangement by share based payment award award vesting period of director awards.
Treasury Stock, Shares
Treasury Stock, Common, Shares
Restructuring costs
Current year outstanding restructuring costs incurred
Current year outstanding restructuring costs incurred
Number of options outstanding at June 30, 2020
Number of options outstanding at June 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number
Other income (expense):
Other Nonoperating Income (Expense) [Abstract]
Litigation Case [Axis]
Litigation Case [Axis]
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Exercise of stock options
Stock Issued During Period, Value, Stock Options Exercised
Trading Symbol
Trading Symbol
Letters of Credit Outstanding, Amount
Letters of Credit Outstanding, Amount
Valuation Allowance Of Deferred Tax Assets - Share Based Payment Awards Compensation Remaining Balance
Valuation Allowance Of Deferred Tax Assets - Share Based Payment Awards Compensation Remaining Balance
Valuation Allowance Of Deferred Tax Assets - Share Based Payment Awards Compensation Remaining Balance
Noncompete Agreements [Member]
Noncompete Agreements [Member]
Iron Workers Pension Plan of Western Pennsylvania, Local 3 [Member]
Iron Workers Pension Plan of Western Pennsylvania, Local 3 [Member]
Iron Workers Pension Plan of Western Pennsylvania, Local 3 [Member]
Weighted average exercise price granted
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Loss on Contracts
Loss on Contracts
Grant date fair value
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Transportation Equipment [Member]
Transportation Equipment [Member]
Pipefitters Retirement Fund, Local 597 [Member]
Pipefitters Retirement Fund Local Five Nine Seven [Member]
Pipefitters Retirement Fund Local Five Nine Seven [Member]
Net income (loss)
Net Income (Loss)
Increase (Decrease) in Income Taxes Receivable
Increase (Decrease) in Income Taxes Receivable
Total current liabilities
Liabilities, Current
Foreign Currency
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Valuation Allowance Of Deferred Tax Assets - Foreign Currency Translation Deduction
Valuation Allowance Of Deferred Tax Assets - Foreign Currency Translation Deduction
Valuation Allowance Of Deferred Tax Assets - Foreign Currency Translation Deduction
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Indefinite-Lived Intangible Assets, Major Class Name [Domain]
Operating Leases
Lessee, Operating Leases [Text Block]
Oil Gas & Chemical [Member]
Oil Gas And Chemical [Member]
Oil gas & chemical.
Liabilities and stockholders' equity
Liabilities and Equity [Abstract]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Stockholders' equity:
Equity, Attributable to Parent [Abstract]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Exercise of stock options, shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Number of options exercised
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period
Domestic
Income (Loss) from Continuing Operations before Income Taxes, Domestic
Deferred Tax Assets, Tax Deferred Expense
Deferred Tax Assets, Tax Deferred Expense
Computation of basic and diluted earnings per share
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Accounts Receivable
Receivable [Policy Text Block]
Cost of revenue
Cost of Goods and Services Sold
Vesting period
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period
Proceeds from asset sales (Note 3)
Proceeds from Sale of Productive Assets
Effect of exchange rate changes on cash
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations
Nonvested deferred share activity
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Summary of Significant Accounting Policies
Significant Accounting Policies [Text Block]
Steamfitters Local Union Number 420 Pension Plan [Member] [Domain]
Steamfitters Local Union Number Four Two Zero Pension Plan [Member] [Domain]
[Domain] for Steamfitters Local Union Number Four Two Zero Pension Plan
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Weighted average exercise price exercised
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Total deferred tax assets
Deferred Tax Assets, Net of Valuation Allowance
Asset Backed Line of Credit Balance Limit for Fixed Charge Coverage Ratio
mtrx:AssetBackedLineofCreditBalanceLimitforFixedChargeCoverageRatio
mtrx:AssetBackedLineofCreditBalanceLimitforFixedChargeCoverageRatio
ABL Borrowing Base
Line of Credit Facility, Current Borrowing Capacity
Adjustment to restructuring reserve
Adjustment to restructuring reserve
Adjustment to restructuring reserve
Iron Workers Pension Plan, Loc. 55 [Member]
Iron Workers Pension Plan, Loc. 55 [Member]
Iron Workers Pension Plan, Loc. 55 [Member]
Vest in 2024 [Member]
Vest in 2022 [Member]
Vest in 2022 [Member]
Zone Green [Member]
Zone Green [Member]
Zone green.
Goodwill
Net Goodwill
Net Goodwill
Goodwill
Property, Plant and Equipment
Property, Plant and Equipment [Table Text Block]
Equity Components [Axis]
Equity Components [Axis]
Employee share purchase limit aggregate market value
Employee Stock Purchase Plan Maximum Annual Share Purchase Limited To Aggregate Market Value
Employee stock purchase plan per participant maximum annual share purchase limited to aggregate market value.
Accrued expenses
Increase (Decrease) in Accrued Liabilities
Pipefitters Local Four Six Zero Pension Plan
Pipefitters Local 460 Pension Plan [Member]
Pipefitters Local 460 Pension Plan
Vesting period, retirement eligible employees
Vesting period, retirement eligible employees
Vesting period, retirement eligible employees
Share available for grant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant
Disaggregation of Revenue [Abstract]
Disaggregation of Revenue [Abstract]
Stock Repurchase Program Expiration Date
Stock Repurchase Program Expiration Date
Lessee, Lease, Description [Table]
Lessee, Lease, Description [Table]
Multiemployer Plan Zone By Type [Axis]
Multiemployer Plan Zone By Type [Axis]
Multiemployer plan zone by type.
IBEW Local Union 98 Pension Plan [Member]
IBEW Local Union Nine Eight Pension Plan [Member]
IBEW Local Union Nine Eight Pension Plan [Member]
Number of options granted
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross
Other Information Related to Leases [Table Text Block]
Other Information Related to Leases [Table Text Block]
Other Information Related to Leases
Entity Small Business
Entity Small Business
Customer Twelve
Customer Twelve [Member]
Customer Twelve
June 30, 2027
Finite-Lived Intangible Asset, Expected Amortization, Year Four
Retentions
Retention Payable [Policy Text Block]
Retention payable.
Pipefitters Local 342 Pension Plan
Pipefitters Local 342 Pension Plan [Member]
Pipefitters Local 342 Pension Plan
Local Phone Number
Local Phone Number
Accounts receivable
Increase (Decrease) in Accounts Receivable
Multiemployer Plans, Underfunded Status, Description
Multiemployer Plans, Underfunded Status, Description
Customer Four [Member]
Customer Four [Member]
Customer four.
Utility and Power Infrastructure
Utility And Power Infrastructure Segment [Member]
Utility And Power Infrastructure Segment
Operating lease liabilities
Non-current operating lease liabilities
Operating Lease, Liability, Noncurrent
Multiemployer Pension Plans
Multiemployer Plan [Table Text Block]
Multiemployer Plans Type [Domain]
Retirement Plan Type [Domain]
Multiemployer Plans [Line Items]
Multiemployer Plan [Line Items]
Line of Credit Facility, Initiation Date
Line of Credit Facility, Initiation Date
Zone Yellow [Member]
Zone Yellow [Member]
Zone yellow.
Retirement Benefits [Abstract]
Retirement Benefits [Abstract]
Industrial Cleaning [Member]
Industrial Cleaning [Member]
Industrial Cleaning
Payment of debt amendment fees
Payments of Debt Issuance Costs
Intangible asset impairments and restructuring costs
Restructuring, Settlement and Impairment Provisions
Loss Contingency, Receivable, Period Increase (Decrease)
Loss Contingency, Receivable, Period Increase (Decrease)
Loss Contingency, Receivable, Period Increase (Decrease)
Case 1 [Member]
Case 1 [Member]
Case 1
Loss Contingencies
Commitments and Contingencies, Policy [Policy Text Block]
Percentage of employee contribution for first half
Percentage Of Employee Contribution As Base For Employer Contributions
Percentage of employee contribution as base for employer contributions.
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Line of Credit Facility, Dividend Restrictions
Line of Credit Facility, Dividend Restrictions
Additional Margin on alternate base rate loans, Maximum
Line Of Credit Basis Spread On Alternate Base Rate Maximum
Line of credit basis spread on alternate base rate maximum.
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents, Policy [Policy Text Block]
Customer Five [Member]
Customer Five [Member] [Member]
Customer Five [Member] [Member]
Borrowing Base Maximum During Year
Borrowing Base Maximum During Year
Borrowing Base Maximum During Year
Income taxes payable
Accrued Income Taxes, Current
Revenue
Revenues
Asset Backed Credit Facility Adjusted Term SOFR Rate Minimum
Asset Backed Credit Facility Adjusted Term SOFR Rate Minimum
Asset Backed Credit Facility Adjusted Term SOFR Rate Minimum
Other liabilities, non-current
Liabilities, Other than Long-Term Debt, Noncurrent
IBEW Local 654 Pension Plan
IBEW Local 654 Pension Plan [Member]
IBEW Local 654 Pension Plan
Schedule of antidilutive securities excluded from computation of diluted earnings per share
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Lease, Cost [Table Text Block]
Lease, Cost [Table Text Block]
Inventories
Increase (Decrease) in Inventories
Costs and estimated earnings in excess of billings on uncompleted contracts
Costs and estimated earnings in excess of billings on uncompleted contracts
Contract with Customer, Asset, after Allowance for Credit Loss, Current
Investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Restructuring Reserve
Restructuring Reserve
Vesting period, equal annual installments
Share Based Compensation Arrangement By Share Based Payment Award Installment Period For Vesting
Share based compensation arrangement by share based payment award installment period for vesting.
Matrix Service Company's 2012 Stock and Incentive Compensation Plan [Member]
Matrix Service Company's 2012 Stock and Incentive Compensation Plan [Member]
Matrix Service Company's 2012 Stock and Incentive Compensation Plan (2012) [Member]
Dilutive nonvested deferred shares
Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Antidilutive securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Award Type [Axis]
Award Type [Axis]
Shares granted
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period
Plan Name [Domain]
Plan Name [Domain]
Income taxes receivable
Income Taxes Receivable, Current
Interest expense
Interest Expense
Accrued losses
Deferred Tax Assets Accrued Losses
Deferred tax assets accrued losses.
Purchases of property, plant and equipment on account
Capital Expenditures Incurred but Not yet Paid
ICFR Auditor Attestation Flag
ICFR Auditor Attestation Flag
Share awards authorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized
Goodwill [Line Items]
Goodwill [Line Items]
Property, Plant and Equipment, Gross
Property, Plant and Equipment, Gross
Weighted average remaining contractual life
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Right-of-Use asset obtained in exchange for operating lease liability
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Stockholders' Equity Note [Abstract]
Stockholders' Equity Note [Abstract]
Operating Loss Carryforwards [Table]
Operating Loss Carryforwards [Table]
Less: imputed interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Components of the provision for income tax expense (benefit)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Entity File Number
Entity File Number
Loss Contingencies [Table]
Loss Contingencies [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Federal Net Operating Losses
Federal Net Operating Losses [Member]
Federal Net Operating Losses
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards [Line Items]
Thereafter
Lessee, Operating Lease, Liability, to be Paid, after Year Five
Operating lease liabilities
Less: current portion of operating lease payments
Operating Lease, Liability, Current
Prepaid Expense, Current
Prepaid Expense, Current
Deferred shares granted
Share Based Compensation Arrangement By Share Based Payment Award Deferred Grants In Period
Share based compensation arrangement by share based payment award deferred grants in period.
Employee Stock Purchase Plans, shares
Shares issued under ESPP
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Auditor Firm ID
Auditor Firm ID
Amortization expense
Amortization of Intangible Assets
Entity Shell Company
Entity Shell Company
Fiscal 2026
Lessee, Operating Lease, Liability, to be Paid, Year Three
Impairment of non-deductible goodwill
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount
Customer relationship impairment 3 [Member]
Customer relationship impairment 3 [Member]
Customer relationship impairment 3
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Minimum threshold shares scheduled to vest for performance based shares
Minimum Threshold Shares Scheduled To Vest For Performance Based Shares
Minimum threshold shares scheduled to vest for performance based shares.
Net carrying amount
Finite-Lived Intangible Assets, Net
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Recently Issued Accounting Standards
New Accounting Pronouncements, Policy [Policy Text Block]
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Customer Eight [Member]
Customer Eight [Member]
Customer Eight [Member]
Finance Lease Gross
Finance Lease Gross
Finance Lease Gross
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Cash, cash equivalents, and restricted cash, beginning of period (Note1)
Cash, cash equivalents, and restricted cash, end of period (Note1)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
Finite-Lived Intangible Assets, Accumulated Amortization
Accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Fiscal 2025
Lessee, Operating Lease, Liability, to be Paid, Year Two
Change in costs and estimated earnings in excess of billings on uncompleted contracts
Change in CIE
Change in CIE from prior year to the current period.
Schedule of sources of pretax income (loss)
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Interest income
Investment Income, Interest
Foreign
Income (Loss) from Continuing Operations before Income Taxes, Foreign
Operating lease expense
Operating Lease, Cost
Impairment of Long-Lived Assets
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Common stock, shares issued
Common Stock, Shares, Issued
Case 3 [Member]
Case 3 [Member]
Case 3
Shares vested and released
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period
Loss Contingency, Receivable, Proceeds
Loss Contingency, Receivable, Proceeds
Utility and Power Infrastructure Capital Project 1 [Member]
Utility and Power Infrastructure Capital Project 1 [Member]
Utility and Power Infrastructure Capital Project 1
Gross profit (loss)
Gross profit (loss)
Gross Profit
Severance costs and other benefits
Severance Costs
Billings on uncompleted contracts in excess of costs and estimated earnings
Billings on uncompleted contracts in excess of costs and estimated earnings
Contract with Customer, Liability, Current
Security Exchange Name
Security Exchange Name
Research and development and other tax credits
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount
Stock-Based Compensation
Share-Based Payment Arrangement [Policy Text Block]
Selling, general and administrative expenses
Selling, General and Administrative Expense
Stock Options [Member]
Employee Stock Option [Member]
Balance at Beginning of Period
Balance at End of Period
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Method Number of Simulations Used
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Method Number of Simulations Used
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Method Number of Simulations Used
Weighted average period
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Maximum [Member]
Maximum [Member]
Operating Loss Carryforwards, Limitations on Use
Operating Loss Carryforwards, Limitations on Use
Deferred FICA
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation
Restructuring and Related Costs [Table Text Block]
Restructuring and Related Costs [Table Text Block]
Unrecognized stock-based compensation expense
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Percentage of real estate leases
Percentage of real estate leases
Percentage of real estate leases
Document Type
Document Type
Connecticut Plumbers and Pipefitters Pension Fund, Local 777 [Member]
Connecticut Plumbers and Pipefitters Pension Fund, Local 777 [Member]
Connecticut Plumbers and Pipefitters Pension Fund, Local 777 [Member]
International [Member]
International [Member]
International.
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Short-term lease expense
Short-Term Lease, Cost
Pro-rate of original awards maximum
Payout As Percentage Of Original Award Maximum
Payout as percentage of original award maximum.
Entity Address, Address Line One
Entity Address, Address Line One
Open market purchase of treasury shares
Treasury Stock, Value, Acquired, Cost Method
Entity Address, Address Line Two
Entity Address, Address Line Two
Inventories
Inventory, Policy [Policy Text Block]
Legal reserve
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Legal Settlements
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Significant components of the Company's deferred tax assets and liabilities
Components of Deferred Tax Assets and Liabilities [Abstract]
Stock-Based Compensation
Share-Based Payment Arrangement [Text Block]
Federal
Current Federal Tax Expense (Benefit)
Organization and Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Other
Other Noncash Income (Expense)
Business Acquisition [Axis]
Business Acquisition [Axis]
Available Increase in Borrowing Capacity
Available Increase in Borrowing Capacity
Available Increase in Borrowing Capacity
Accounts receivable, allowances
Accounts Receivable, Allowance for Credit Loss, Current
Customer Thirteen
Customer Thirteen [Member]
Customer Thirteen
Availability under the senior credit facility
Schedule of Line of Credit Facilities [Table Text Block]
Operating Loss Carryforwards
Operating Loss Carryforwards
Customer Concentration Risk [Member]
Customer Concentration Risk [Member]
Restricted Cash
Restricted Cash, Noncurrent
Customer One [Member]
Customer One [Member]
Customer one.
State
Deferred State and Local Income Tax Expense (Benefit)
Other accrued expenses
Other Liabilities, Current
Income Statement [Abstract]
Income Statement [Abstract]
Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share
Antidilutive Securities Excluded From Computation Of Diluted Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of diluted earnings per share.
Contract with Customer, Basis of Pricing [Axis]
Contract with Customer, Basis of Pricing [Axis]
Costs and estimated earnings in excess of billings on uncompleted contracts
Increase (Decrease) in Contract with Customer, Asset
Title of 12(b) Security
Title of 12(b) Security
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
Accounts Receivable Reserve - Write Off of Fully Reserved Balance
Accounts Receivable Reserve - Write Off of Fully Reserved Balance
Accounts Receivable Reserve - Write Off of Fully Reserved Balance
Gross [Member]
Operating Segments [Member]
Schedule of Multiemployer Plans [Table]
Multiemployer Plan [Table]
Weighted average grant date fair value per share at June 30, 2022
Weighted average grant date fair value per share at June 30, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Other current assets
Other Assets, Current
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Expected provision (benefit) for federal income taxes at the statutory rate
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Diluted EPS:
Earnings Per Share, Diluted [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Payment Arrangement [Abstract]
Entity Tax Identification Number
Entity Tax Identification Number
Translation adjustment
Goodwill, Foreign Currency Translation Gain (Loss)
Insurance Reserves
Insurance Reserves [Policy Text Block]
Disclosure of accounting policy for insurance reserves.
Inventories
Inventory, Net
Asset Backed Line of Credit Percentage Limit for Fixed Charge Coverage Ratio
mtrx:AssetBackedLineofCreditPercentageLimitforFixedChargeCoverageRatio
mtrx:AssetBackedLineofCreditPercentageLimitforFixedChargeCoverageRatio
Total lease expense
Lease, Cost
Branch future liability
FutureBranchLiability
Future domestic income tax liability related to foreign branch deferred tax assets.
Range [Axis]
Statistical Measurement [Axis]
Customer Eleven [Member]
Customer Eleven [Member]
Customer Eleven [Member]
Entity Interactive Data Current
Entity Interactive Data Current
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities:
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]
Open market purchase of treasury shares
Payments for Repurchase of Common Stock
Payments for Repurchase of Common Stock
Percentage of outstanding shares used to determine maximum shares authorized under share repurchase program
Percentage of outstanding shares used to determine maximum shares authorized under share repurchase program
Percentage of outstanding shares used to determine maximum shares authorized under share repurchase program
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Reversal of branch liability
Reversal of branch liability
Reversal of Canadian branch liability in connection with valuation allowance on Canadian NOLs and FTCs.
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Foreign
Deferred Foreign Income Tax Expense (Benefit)
Non-cash investing and financing activities:
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Segment [Domain]
Segments [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Contract Receivable Retainage, after Next Twelve Months
Construction Contractor, Receivable, Retainage, after Year One
Consolidation Items [Domain]
Consolidation Items [Domain]
FIP/RP Status Pending or Implemented
Multiemployer Plan, Pension, Significant, Funding Improvement or Rehabilitation Plan, Implementation Status [Fixed List]
Retained earnings
Retained Earnings (Accumulated Deficit)
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Customer relationship impairment 2 [Member]
Customer relationship impairment 2 [Member]
Customer relationship impairment 2
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Current assets:
Assets, Current [Abstract]
Laborers Local 220 Pension Plan
Laborers Local 220 Pension Plan [Member]
Laborers Local 220 Pension Plan
Goodwill
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
Leases [Abstract]
Leases [Abstract]
Deferred tax assets:
Components of Deferred Tax Assets [Abstract]
Significant components of the Company's deferred tax assets and liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Entity Address, State or Province
Entity Address, State or Province
Tax over book (book over tax) amortization
Deferred Tax Liabilities, Goodwill
Disposal Group, Including Discontinued Operation, Goodwill
Disposal Group, Including Discontinued Operation, Goodwill
Operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
June 30, 2024
Finite-Lived Intangible Asset, Expected Amortization, Year One
Operating lease payments
Operating Lease, Payments
Components of the provision for income taxes
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Asset Backed Credit Facility Adjusted Term SOFR Rate Three Month Tenor
Asset Backed Credit Facility Adjusted Term SOFR Rate Three Month Tenor
Asset Backed Credit Facility Adjusted Term SOFR Rate Three Month Tenor
Other international [Member]
Other international [Member]
Other international [Member]
Basic EPS:
Earnings Per Share, Basic [Abstract]
Operating lease right-of-use asset impairment
Operating Lease, Impairment Loss
Land Buildings And Improvements Gross
Land Buildings And Improvements Gross
Land Buildings And Improvements Gross
Customer Seven [Member]
Customer Seven [Member]
Customer Seven [Member]
Auditor Location
Auditor Location
National Electrical Benefit Fund, Local 488 and 126 [Member]
National Electrical Benefit Fund, Local 488 and 126 [Member]
National Electrical Benefit Fund, Local 488 and 126 [Member]
Employee contribution for next 2%
Defined Contribution Plan Employer Matching Contribution Percent For Two percent of Employee Contribution
Defined contribution plan employer matching contribution percent for next two percent of employee contribution.
Common stock, shares outstanding
Shares, Outstanding
Customer relationship impairment 1 [Member]
Customer relationship impairment 1 [Member]
Customer relationship impairment 1
State income taxes, net of federal benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Finite-Lived Trade Names, Gross
Finite-Lived Trade Names, Gross
Common stock, par value
Common Stock, Par or Stated Value Per Share
Percentage of employee contribution for next half
Percentage of Employee Contribution As Base for Employer Contribution to Match
Percentage of employee contribution as base for employer contribution to match
Class of Stock [Domain]
Class of Stock [Domain]
Net cash provided (used) by investing activities
Net Cash Provided by (Used in) Investing Activities
Other Lease Information [Abstract]
Other Lease Information [Abstract]
Other Lease Information
Customer [Domain]
Customer [Domain]
Remeasurement of deferred taxes
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount
Stock option activity and related information
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Change in billings on uncompleted contracts in excess of costs and estimated earnings
Change in BIE
Change in BIE from the prior year to the current period.
Type of Deferred Compensation, All Types [Domain]
Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain]
Name of Property [Domain]
Name of Property [Domain]
Net present value of future lease payments
Operating Lease, Liability
Liability for Uncertain Tax Positions, Noncurrent
Liability for Uncertainty in Income Taxes, Noncurrent
Total liabilities
Liabilities
Total
Current Income Tax Expense (Benefit)
Expected volatility
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Additional Margin on alternate base rate loans, Minimum
Line Of Credit Basis Spread On Alternate Base Rate Minimum
Line of credit basis spread on alternate base rate minimum.
Customer Two [Member]
Customer Two [Member]
Customer two.
Joint Pension Fund Local Union One Six Four Ibew [Domain]
Joint Pension Fund Local Union One Six Four Ibew [Member]
Joint Pension Fund Local Union One Six Four Ibew
Accumulated Other Comprehensive Income(Loss)
AOCI Attributable to Parent [Member]
Charged to Costs and Expenses
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense
Contribution made by company
Defined Contribution Plan, Cost
Property, Plant and Equipment Disclosure
Property, Plant and Equipment Disclosure [Text Block]
Repayments of advances under asset-backed credit facility
Repayments of Long-Term Lines of Credit
Other
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Local 351 IBEW Pension Plan [Member]
Local Three Five One Ibew Pension Plan [Domain]
Local 351 Ibew pension plan.
Share Based Compensation Arrangement By Share Based Payment Award Deferred Shares Cancelled Weighted Average Grant Date Fair Value
Share Based Compensation Arrangement By Share Based Payment Award Deferred Shares Cancelled Weighted Average Grant Date Fair Value
Share Based Compensation Arrangement By Share Based Payment Award Deferred Shares Cancelled Weighted Average Grant Date Fair Value
Plan Name [Axis]
Plan Name [Axis]
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
CANADA
CANADA
Property, Plant and Equipment, Type [Domain]
Long-Lived Tangible Asset [Domain]
Earnings Per Share [Abstract]
Earnings Per Share [Abstract]
Common stock—$.01 par value; 60,000,000 shares authorized; 27,888,217 shares issued as of June 30, 2023 and June 30, 2022; 27,047,318 and 26,790,514 shares outstanding as of June 30, 2023 and June 30, 2022, respectively
Common Stock, Value, Issued
Asset Backed Credit Facility Adjusted Term SOFR Three Month Add On
Asset Backed Credit Facility Adjusted Term SOFR Three Month Add On
Asset Backed Credit Facility Adjusted Term SOFR Three Month Add On
Reporting Unit at Risk [Member]
Reporting Unit [Member]
Reporting Unit [Member]
Reporting unit at risk for impairment
Trade Names [Member]
Trade Names [Member]
Trade Names [Member]
Percentage of plan funded
Percentage of Plan Funded
Percentage of plan funded.
Ironworkers Mid-America Pension Plan, Local 395 [Member]
Ironworkers Mid-America Pension Plan [Member]
Ironworkers Mid-America Pension Plan [Member]
Loss Contingency [Abstract]
Loss Contingency [Abstract]
State
Current State and Local Tax Expense (Benefit)
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Description
Multiemployer Plans, Collective-Bargaining Arrangement, Description
Segment Reporting, Policy
Segment Reporting, Policy [Policy Text Block]
Total current assets
Assets, Current
Deferred:
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Goodwill attributable to reporting units at risk for impairment
Goodwill attributable to reporting units at risk for impairment
Goodwill attributable to reporting units at risk for impairment
Insurance reserve
Deferred Tax Assets Insurance Reserve
Deferred tax assets insurance reserve.
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Abstract]
Transportation Equipment Gross
Transportation Equipment Gross
Transportation Equipment Gross
Other cash flow information:
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information [Abstract]
Litigation Case [Domain]
Litigation Case [Domain]
Other
Other Nonoperating Income (Expense)
Entity Filer Category
Entity Filer Category
Statement [Table]
Statement [Table]
Current Fiscal Year End Date
Current Fiscal Year End Date
Customer Six [Member]
Customer Six [Member]
Customer Six [Member]
Stock Repurchase Program, Authorized Amount
Annual maximum purchases authorized under stock buyback program
Stock Repurchase Program, Authorized Amount
Goodwill and Other Intangible Assets
Goodwill and Intangible Assets Disclosure [Text Block]
Stock Repurchased During Period, Shares
Stock Repurchased During Period, Shares
Reconciliation between the expected income tax provision applying the domestic federal statutory tax rate and the reported income tax provision
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Excess tax expense (benefits) related to stock compensation vesting
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Percentage of Revenue
Concentration Risk, Percentage
Percentage of limitation on pretax compensation
Defined Contribution Plan Maximum Annual Contribution by Employee Percent
Maximum percentage of employee gross pay, by the terms of the plan, that the employee may contribute to a defined contribution plan.
Preferred Stock, Shares Authorized
Preferred Stock, Shares Authorized
Current:
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Summary of Tax Credit Carryforwards
Summary of Tax Credit Carryforwards [Table Text Block]
Repayments of advances under senior secured revolving credit facility
Repayments of advances under senior secured revolving credit facility
Repayments of advances under senior secured revolving credit facility
Weighted average grant date fair value per share granted
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
June 30, 2028
Finite-Lived Intangible Asset, Expected Amortization, Year Five
Number of options cancelled
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period
Building [Member]
Building [Member]
Carrying value of goodwill by segment
Schedule of Goodwill [Table Text Block]
Net operating loss benefit and credit carryforwards
Deferred Tax Assets, Tax Credit Carryforwards
Issuance of deferred shares, shares
Deferred Shares Issued
Deferred Shares Issued
Stock compensation expense on nonvested deferred shares
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost
Net cash provided (used) by operating activities
Net Cash Provided by (Used in) Operating Activities
Deductions
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction
Aggregate intrinsic value exercisable at June 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Vest in 2025 [Member]
Vest in 2023 [Member]
Vest in 2023 [Member]
Matrix Service Company 2016 Stock and Incentive Compensation Plan [Member]
Matrix Service Company 2016 Stock and Incentive Compensation Plan [Member]
Matrix Service Company 2016 Stock and Incentive Compensation Plan [Member]
Class of Stock [Axis]
Class of Stock [Axis]
Indiana Laborers Pension Fund [Domain]
Indiana Laborers Pension Fund [Domain]
Indiana Laborers Pension Fund [Domain]
Pro-rate of original awards, minimum
Payout As Percentage Of Original Award Minimum
Payout as percentage of original award minimum.
Cash Performance Awards
Cash Performance Awards [Member]
Cash Performance Awards
Unpriced Change Orders and Claims
Construction Contractor, Contract Cost, Subject to Uncertainty, Amount
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table]
Accrued compensation and pension
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions
Depreciation and amortization
Depreciation and amortization expense
Depreciation, Depletion and Amortization
Description of plans funded
Description of Funded Portion of Plan
Description of funded portion of plan.
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents Items [Line Items]
Contract with customer, current liability, net
Contract with customer current liability, net
Contract with customer current liability, net
Office Equipment and Software [Member]
Furniture and Fixtures [Member]
Lease Contractual Term [Domain]
Lease Contractual Term [Domain]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Depreciation
Depreciation, Depletion, and Amortization [Policy Text Block]
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Consolidation Items [Axis]
Consolidation Items [Axis]
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Goodwill impairment
Goodwill impairment
Goodwill, Impairment Loss
Long-Lived Assets
Long-Lived Assets
Valuation allowance
Deferred Tax Assets, Valuation Allowance
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
CARES ACT deferred payroll tax liability
CARES ACT deferred payroll tax liability
CARES ACT deferred payroll tax liability
Contract with Customer, Liability, Revenue Recognized
Contract with Customer, Liability, Revenue Recognized
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Repurchase of common stock for payment of statutory taxes due on equity-based compensation
Payments for Repurchase of Other Equity
Concentration Risk Type [Axis]
Concentration Risk Type [Axis]
Expected life in years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term
Accounts Receivable Reserve - Recovery
Accounts Receivable Reserve - Recovery
Accounts Receivable Reserve - Recovery
Restructuring and Related Activities Disclosure [Text Block]
Restructuring and Related Activities Disclosure [Text Block]
Property, Plant and Equipment, Type [Axis]
Long-Lived Tangible Asset [Axis]
Asset Backed Credit Facility Federal Funds Rate Addition
mtrx:AssetBackedCreditFacility_FederalFundsRateAddition
mtrx:AssetBackedCreditFacilityFederalFundsRateAddition
Assumptions used to calculate grant date fair value
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Entity Emerging Growth Company
Entity Emerging Growth Company
Long-lived Assets by Geographic Areas [Table Text Block]
Long-Lived Assets by Geographic Areas [Table Text Block]
Employee Benefit Plans (Textual) [Abstract]
Employee Benefit Plans (Textual) [Abstract]
Employee benefit plans.
Other intangible assets
Intangible Assets, Net (Excluding Goodwill)
Charged to Other Accounts
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Process and Industrial Facilities
Process and Industrial Facilities Segment [Member]
Process and Industrial Facilities Segment
Document Fiscal Period Focus
Document Fiscal Period Focus
Fiscal 2024
Lessee, Operating Lease, Liability, to be Paid, Year One
Useful life of intangible assets
Finite-Lived Intangible Asset, Useful Life
Availability under the ABL Facility
Line of Credit Facility, Remaining Borrowing Capacity
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Fiscal 2027
Lessee, Operating Lease, Liability, to be Paid, Year Four
Weighted average exercise price at June 30, 2020
Weighted average exercise price at June 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Stock-based compensation expense
Share-Based Payment Arrangement, Noncash Expense
Common Stock
Common Stock [Member]
Foreign Tax Authority [Member]
Foreign Tax Authority [Member]
Proceeds from Income Tax Refunds
Proceeds from Income Tax Refunds
SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis]
SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis]
City Area Code
City Area Code
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Earnings per Common Share
Earnings Per Share [Text Block]
SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain]
SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain]
Nonvested deferred share activity
Schedule of Nonvested Share Activity [Table Text Block]
Additional Margin on Adjusted Term SOFR, Maximum
Additional Margin on Adjusted Term SOFR, Maximum
Additional Margin on Adjusted Term SOFR, Maximum
Document Fiscal Year Focus
Document Fiscal Year Focus
Geographical [Domain]
Geographical [Domain]
Total stockholders' equity
Balances, beginning
Balances, ending
Equity, Including Portion Attributable to Noncontrolling Interest
Foreign tax credit carryforward [Member]
Federal foreign tax credit carryforward [Member]
Foreign tax credit carryforward [Member]
Valuation Allowance Of Deferred Tax Assets - Share Based Payment Awards Compensation (Deduction)
Valuation Allowance Of Deferred Tax Assets - Share Based Payment Awards Compensation (Deduction)
Valuation Allowance Of Deferred Tax Assets - Share Based Payment Awards Compensation (Deduction)
Operating lease term (up to)
Lessee, Operating Lease, Term of Contract
Line of credit facility, expiration date
Line of Credit Facility, Expiration Date
Minimum [Member]
Minimum [Member]
Property, plant and equipment, net
Property, Plant and Equipment, Net
Weighted average common shares outstanding:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Share Repurchase Program [Domain]
Share Repurchase Program [Domain]
Orange California Facility
Orange California Facility [Member]
Orange California Facility
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Cash
Cash
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Equity, Class of Treasury Stock [Line Items]
Equity, Class of Treasury Stock [Line Items]
Assets
Assets [Abstract]
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Abstract]
Description of vesting period of director awards
Share Based Compensation Arrangement By Share Based Payment Award Award Description of Vesting Period of Director Awards
Share based compensation arrangement by share based payment award award description of vesting period of director award.
Accrued insurance
Accrued Insurance, Current
Contract with Customer, Basis of Pricing [Domain]
Contract with Customer, Basis of Pricing [Domain]
Valuation and Qualifying Accounts
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Accelerated amortization of deferred debt amendment fees (Note 5)
Other Noncash Expense
Plumbers and Pipefitters Local Union Seven Four Pension Fund [Member]
Plumbers and Pipefitters Local Union Seven Four Pension Fund [Member]
Plumbers and Pipefitters Local Union Seven Four Pension Fund [Member]
Foreign currency translation and other
Deferred Tax Assets, Other
EIN/Pension Plan Number
Multiemployer Plans Number
Multiemployer plans number.
Net income (loss)
Net income (loss)
Net loss
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Cash paid during the period for income taxes
Income Taxes Paid, Net
Case 2 [Member]
Case 2 [Member]
Case 2
Deferred income tax assets
Deferred Income Tax Assets, Net
Net cash used by financing activities
Net Cash Provided by (Used in) Financing Activities
Multiemployer Plan Type [Axis]
Retirement Plan Type [Axis]
Deferred shares vested and released
Share Based Compensation Arrangement By Share Based Payment Award Deferred Shares Vested And Released
Share based compensation arrangement by share based payment award deferred shares vested and released.
Employee Award [Member]
Employee Award [Member]
Employee Award.
Lessee, Lease, Description [Line Items]
Lessee, Lease, Description [Line Items]
Houston Interests, LLC [Member]
Houston Interests, LLC [Member]
Houston Interests, LLC [Member]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Multiemployer Plan, Employer Contribution, Cost
Multiemployer Plan, Pension, Significant, Employer Contribution, Cost
Retained Earnings
Retained Earnings [Member]
Retained Earnings [Member]
Asset Backed Credit Facility Adjusted Term SOFR One Month Add On
Asset Backed Credit Facility Adjusted Term SOFR One Month Add On
Asset Backed Credit Facility Adjusted Term SOFR One Month Add On
Total liabilities and stockholders' equity
Liabilities and Equity
Other assets
Other Assets, Noncurrent
Revenue [Abstract]
Revenue [Abstract]
Revenue [Abstract]
Facility costs
Business Exit Costs
IBEW Local 456 Pension Plan [Member] [Domain]
IBEW Local Four Five Six Pension Plan [Member] [Domain]
[Domain] for IBEW Local Four Five Six Pension Plan
Risk-free interest rate
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Finite-Lived Intangible Assets, Remaining Amortization Period
Finite-Lived Intangible Assets, Remaining Amortization Period
Operating lease right-of-use assets
Operating Lease, Right-of-Use Asset
Basic loss per common share
Basic loss per common share (in dollars per share)
Earnings Per Share, Basic
Market Based Awards [Member]
Market Based Awards [Member]
Market based awards.
Treasury Shares Sold to Employee Stock Purchase Plan
Stock Issued During Period, Value, Employee Stock Purchase Plan
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Class of Treasury Stock [Table]
Class of Treasury Stock [Table]
Change in net contract balances
Change in net contract balances
Change in net contract balances from the prior year to the current year.
Foreign
Current Foreign Tax Expense (Benefit)
Utility and Power Infrastructure Project 3 [Member]
Utility and Power Infrastructure Project 3 [Member]
Utility and Power Infrastructure Project 3
Net deferred tax asset (liability)
Deferred Tax Assets, Net
Total intrinsic value of stock option
Aggregate intrinsic value exercised
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value
Warranty reserve
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Warranty Reserves
Entity Address, City or Town
Entity Address, City or Town
Restrictions on Cash and Cash Equivalents
Restrictions on Cash and Cash Equivalents [Table Text Block]
Shares available at ESPP
Employee Stock Purchase Plan Maximum Number Of Shares Available For Issuance
Employee stock purchase plan maximum number of shares available for issuance.
Results of Operations
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Restricted Stock or Unit Expense
Restricted Stock or Unit Expense
Storage Solutions [Member]
Storage Solutions [Member]
Storage solutions.
Utility and Power Infrastructure Capital Project 2 [Member]
Utility and Power Infrastructure Capital Project 2 [Member]
Utility and Power Infrastructure Capital Project 2
Issuance of restricted stock
Issuance Of Deferred Shares
Issuance of deferred shares.
Valuation Allowance Of Deferred Tax Assets - Fully Reserved Tax Credits
Valuation Allowance Of Deferred Tax Assets - Fully Reserved Tax Credits
Valuation Allowance Of Deferred Tax Assets - Fully Reserved Tax Credits
Restructuring costs
Restructuring Charges
Document Transition Report
Document Transition Report
Performance obligations to be recognized as revenue within next twelve months
Performance obligations to be recognized as revenue within next twelve months
Performance obligations to be recognized as revenue within next twelve months.
Advances under senior secured revolving credit facility
Advances under senior secured revolving credit facility
Advances under senior secured revolving credit facility (JPMorgan Chase Facility)
Nonvested Deferred Shares [Member]
Nonvested Deferred Shares [Member]
Nonvested Deferred Shares [Member]
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax
Accounts payable
Increase (Decrease) in Accounts Payable
Common stock, shares authorized
Common Stock, Shares Authorized
Entity Public Float
Entity Public Float
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercised
Schedule of Revenue by Major Customers by Reporting Segments
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
Deferred Tax Liabilities, Deferred Expense, Capitalized Research and Development Costs
Deferred Tax Liabilities, Deferred Expense, Capitalized Research and Development Costs
Asset Backed Credit Facility Adjusted Term SOFR Rate One Month Tenor
mtrx:AssetBackedCreditFacilityAdustedTermSOFRRateOneMonthAddOn
Basis points for a one-month tenor for Adjusted Term SOFR.
Indefinite-lived Intangible Assets by Major Class [Axis]
Indefinite-Lived Intangible Assets [Axis]
Property, Plant and Equipment [Abstract]
Customer Nine [Member]
Customer Nine [Member]
Customer Nine [Member]
Contributions to other multiemployer plans
Multiemployer Plan, Pension, Insignificant, Employer Contribution, Cost
Excess tax expense (benefit) on stock-based compensation
Effect of new accounting standard compared to old standard
Effect of new accounting standard compared to old standard
Finite-lived Intangible Assets, Fair Value Disclosure
Finite-Lived Intangible Assets, Fair Value Disclosure
Maximum Operating Lease Term
Maximum Operating Lease Term [Member]
Maximum Operating Lease Term
Vest in 2023 [Member]
Vest in 2021 [Member]
Vest in 2021 [Member]
Contract receivable in dispute
Contracts Receivable, Claims and Uncertain Amounts
Change in uncertain tax positions
Effective Income Tax Rate Reconciliation, Tax Contingency, Other, Amount
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Other, Description
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Other, Description
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Industrial [Member]
Industrial [Member]
Industrial.
Provision for uncollectible accounts
Accounts Receivable, Credit Loss Expense (Reversal)
Additional paid-in capital
Additional Paid in Capital
Weighted average fair value
Share Based Compensation Arrangement By Share Based Payment Award Deferred Shares Vested And Released Weighted Average Grant Date Fair Value
Share based compensation arrangement by share based payment award deferred shares vested and released weighted average grant date fair value.
Weighted average grant date fair value per share cancelled
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Stock Issued During Period, Value, Restricted Stock Award, Gross
Stock Issued During Period, Value, Restricted Stock Award, Gross
Total
Deferred Income Tax Expense (Benefit)
Issuances of common stock
Proceeds from Stock Options Exercised
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Deferred income tax
Deferred Income Tax Expense Benefit Socf
Deferred income tax expense benefit socf.
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Per Basic Share
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Per Basic Share
Total contributions made
Multiemployer Plan, Employer Contribution, Cost
Income Taxes
Income Tax, Policy [Policy Text Block]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding
June 30, 2026
Finite-Lived Intangible Asset, Expected Amortization, Year Three
Significant components of the Company's deferred tax assets and liabilities as reported in the Consolidated Balance Sheets
Schedule of Components of Deferred Tax Assets and Liabilities Net [Table Text Block]
Schedule of components of deferred tax assets and Liabilities, net.
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Shares cancelled
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Amount of non-deductible goodwill impaired.
Amount of non-deductible goodwill impaired.
Amount of non-deductible goodwill impaired
Zone Red [Member]
Zone Red [Member]
Zone red.
Company match of first 3% of employee contributions
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Compensating Balance, Amount
Compensating Balance, Amount
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased
Foreign tax credit carryforwards
Foreign tax credit carryforwards [Member]
Foreign tax credit carryforwards
Asset Backed Credit Facility Fixed Charge Coverage Ratio Requirement
Asset Backed Credit Facility Fixed Charge Coverage Ratio Requirement
Asset Backed Credit Facility Fixed Charge Coverage Ratio Requirement
Customer based [Member]
Customer Based [Member]
Customer based member.
Aggregate intrinsic value outstanding at June 30, 2020
Aggregate intrinsic value outstanding at June 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Electrical Infrastructure [Member]
Electrical Infrastructure [Member]
Electrical infrastructure.
Revenue, Major Customer [Line Items]
Revenue, Major Customer [Line Items]
Intellectual Property [Member]
Intellectual Property [Member]
Machinery and Equipment, Gross
Machinery and Equipment, Gross
Treasury shares repurchased to satisfy tax withholding obligations
Other Treasury Share Purchases
Other treasury share purchases.
Entity Registrant Name
Entity Registrant Name
Dilutive stock options
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements
Other assets and liabilities
Increase (Decrease) in Other Operating Assets
Disclosure Customer Contracts Additional Information [Abstract]
Disclosure Customer Contracts Additional Information [Abstract]
Disclosure - Customer Contracts - Additional Information [Abstract]
June 30, 2025
Finite-Lived Intangible Asset, Expected Amortization, Year Two
Documents Incorporated by Reference
Documents Incorporated by Reference [Text Block]
Lease Contractual Term [Axis]
Lease Contractual Term [Axis]
Deferred tax liabilities:
Components of Deferred Tax Liabilities [Abstract]
Payments for Restructuring
Payments for Restructuring
Auditor Name
Auditor Name
Document Period End Date
Document Period End Date
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Weighted average exercise price exercisable at June 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Finance Lease, Weighted Average Discount Rate, Percent
Finance Lease, Weighted Average Discount Rate, Percent
Paid time-off accrual
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Compensated Absences
Treasury Stock
Treasury Stock [Member]
Treasury Stock, Common [Member]
Entity Central Index Key
Entity Central Index Key
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Gain on sale of property, plant and equipment
Gain (Loss) on Disposition of Property Plant Equipment
Gain (Loss) on Disposition of Property Plant Equipment
Finite-Lived Intangible Assets, Gross
Gross carrying amount
Finite-Lived Intangible Assets, Gross
Provision (benefit) for federal, state and foreign income taxes
Provision (benefit) for federal, state and foreign income taxes
Income Tax Expense (Benefit)
Contract Receivable Retainage, Next Twelve Months
Construction Contractor, Receivable, Retainage, Year One
Customer Ten
Customer Ten [Member]
Customer Ten [Member]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Employee Stock Purchase Plan, Termination Date
Employee Stock Purchase Plan, Termination Date
Employee Stock Purchase Plan, Termination Date
Summary of Operating Loss Carryforwards
Summary of Operating Loss Carryforwards [Table Text Block]
Accrued wages and benefits
Employee-related Liabilities, Current
Revenue Benchmark [Member]
Revenue Benchmark [Member]
Federal tax credits
Federal tax credit carryforwards [Member]
Federal tax credit carryforwards
Foreign currency translation gain (loss) (net of tax expense of $0, $71 and $223 for the fiscal years ended June 30, 2023, 2022 and 2021, respectively)
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Operating Loss Carryforwards, Valuation Allowance
Operating Loss Carryforwards, Valuation Allowance
Disaggregation of Revenue [Table Text Block]
Disaggregation of Revenue [Table Text Block]
Total stockholders' equity before treasury stock
Stockholders' Equity before Treasury Stock
Gross revenues
Gross revenues
Gross revenues before intersegment eliminations
Weighted-average remaining lease term (in years)
Operating Lease, Weighted Average Remaining Lease Term
Significant components of Company's deferred tax assets and liabilities as reported in consolidated balance sheets
Significant components of Company's deferred tax assets and liabilities as reported in consolidated balance sheets [Abstract]
Significant components of Company's deferred tax assets and liabilities as reported in consolidated balance sheets
Foreign tax differential
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount
Charges without tax benefit
Income Tax Reconciliation Charges Without Tax Benefit
Income Tax Reconciliation, Charges without tax benefit
Amendment Flag
Amendment Flag
Reconciliation between the expected income tax provision applying the domestic federal statutory tax rate and the reported income tax provision
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Book over tax amortization
Deferred Tax Assets, Goodwill and Intangible Assets
Tax Credit Carryforward, Amount
Tax Credit Carryforward, Amount
Office Equipment and Capitalized Computer Software Gross
Office Equipment and Capitalized Computer Software Gross
Office equipment and capitalized computer software gross.
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Cash and Cash Equivalents, at Carrying Value
Borrowing Base Minimum During Year
Borrowing Base Minimum During Year
Borrowing Base Minimum During Year
Weighted-average discount rate
Operating Lease, Weighted Average Discount Rate, Percent
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Cash paid during the period for interest
Interest Paid, Excluding Capitalized Interest, Operating Activities
Comprehensive loss
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Open market purchase of treasury shares, shares
Treasury Stock, Shares, Acquired
Change in Shares Available Under Plan
Change in Shares Available Under Plan
Change in Shares Available Under Plan
OhioCarpentersPensionFundLocal1090and351
OhioCarpentersPensionFundLocal1090and351 [Member]
OhioCarpentersPensionFundLocal1090and351
Depreciable life of office equipment and software
Property, Plant and Equipment, Useful Life
Property, Plant and Equipment, Useful Life
Finance Lease, Weighted Average Remaining Lease Term
Finance Lease, Weighted Average Remaining Lease Term
Net deferred tax liability
Deferred Tax Liabilities, Net
Diluted (in shares)
Diluted weighted average shares
Weighted Average Number of Shares Outstanding, Diluted
Carrying value of other intangible assets
Schedule Of Intangible Assets Excluding Goodwill Table [Table Text Block]
Schedule of intangible assets excluding goodwill.
Goodwill attributable to reporting units at risk for impairment-subsequent event
Goodwill attributable to reporting units at risk for impairment-subsequent event
Goodwill attributable to reporting units at risk for impairment-subsequent event
Director Awards [Member]
Director Awards [Member]
Director Awards [Member]
Contract with Customer, Asset and Liability [Table Text Block]
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Carrying value of other intangible assets
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Disposal of business
Goodwill, Written off Related to Sale of Business Unit
Additional Margin on Adjusted Term SOFR, Minimum
Additional Margin on Adjusted Term SOFR, Minimum
Additional Margin on Adjusted Term SOFR, Minimum
Baillie Tank Equipment, Ltd. [Member]
Baillie Tank Equipment, Ltd. [Member]
Baillie Tank Equipment, Ltd. [Member]
Revenue from Contract with Customer [Text Block]
Revenue from Contract with Customer [Text Block]
Performance shares earned in excess of target, Amount
Performance shares earned in excess of target, Amount
Performance shares earned in excess of target, Amount
Capital expenditures
Capital expenditures
Payments to Acquire Property, Plant, and Equipment
Additional Paid-In Capital
Additional Paid-In Capital [Member]
Additional Paid-in Capital [Member]
Document Annual Report
Document Annual Report
Alternate Base Rate Margin
Alternate Base Rate Margin
Alternate Base Rate Margin
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings
Bad debt reserve
Deferred Tax Asset, Tax Deferred Expense, Reserve and Accrual, Accounts Receivable, Allowance for Credit Loss
Weighted average exercise price cancelled
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price
Lease, Cost [Abstract]
Lease, Cost [Abstract]
Total assets
Segment assets
Assets
Share Repurchase Program [Axis]
Share Repurchase Program [Axis]
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Cover [Abstract]
Construction Equipment [Member]
Equipment [Member]
Stock-based compensation expense
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
Unallocated Corporate Costs
Unallocated Corporate Costs [Member]
mtrx:UnallocatedCorporateCosts
UNITED STATES
UNITED STATES
Restructuring and Related Activities [Abstract]
Weighted average grant date fair value per share vested and released
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Total future operating lease payments
Lessee, Operating Lease, Liability, to be Paid
Revenue, Remaining Performance Obligation, Amount
Revenue, Remaining Performance Obligation, Amount
Restrictions on Cash and Cash Equivalents [Table]
Restrictions on Cash and Cash Equivalents [Table]
Northwestern Ohio Plumbers and Pipe Fitters Local 50 [Member]
Northwestern Ohio Plumbers and Pipe Fitters Local 50 [Member]
Northwestern Ohio Plumbers and Pipe Fitters Local 50
Employee Benefit Plans
Compensation and Employee Benefit Plans [Text Block]
Share Based Performance Awards
Share Based Performance Awards [Member]
Share Based Performance Awards
Segment Information
Segment Reporting Disclosure [Text Block]
Revenue, Performance Obligation [Abstract]
Revenue, Performance Obligation [Abstract]
Net increase (decrease) in cash and cash equivalents
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Time-and-materials Contract
Time-and-Materials Contract [Member]
Equity Component [Domain]
Equity Component [Domain]
Goodwill and other intangible asset impairment
Goodwill and other intangible asset impairment (Note 4)
Goodwill and Intangible Asset Impairment
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress
Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress
State and Local Jurisdiction [Member]
State and Local Jurisdiction [Member]
Receivable holdbacks and other
Deferred Tax Liabilities, Other
Basic (in shares)
Weighted average shares outstanding
Weighted Average Number of Shares Outstanding, Basic
Entity Current Reporting Status
Entity Current Reporting Status
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Fixed-price Contract
Fixed-Price Contract [Member]
Operating loss
Operating income (loss)
Operating Income (Loss)
Holdback receivable
Holdback receivable
Amount receivable from acquirer of our industrial cleaning business.
Tax over book depreciation
Deferred Tax Liabilities, Property, Plant and Equipment
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Total deferred tax liabilities
Deferred Tax Liabilities, Gross
Utility and Power Infrastructure Member
Utility and Power Infrastructure Member [Member]
Utility and Power Infrastructure Member
Unused Credit Facility Fee
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Business Segments [Axis]
Segments [Axis]
Statement [Line Items]
Statement [Line Items]
Treasury shares repurchased to satisfy tax withholding obligations
Other Treasury Shares Acquired
Other Treasury Shares Acquired
Other treasury shares acquired.
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Number of options vested or expected to vest at June 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]
Results of Operations
Segment Reporting Information, Profit (Loss) [Abstract]
Borrowings under asset-backed credit facility
Long-Term Line of Credit
Name of Property [Axis]
Name of Property [Axis]
Advances under asset-backed credit facility
Proceeds from Long-Term Lines of Credit
Average grant date fair value
Share Based Compensation Arrangement By Share Based Payment Award Deferred Weighted Average Grant Date Fair Value
Share based compensation arrangement by share based payment award deferred weighted average grant date fair value.
Burlington Office [Member]
Burlington Office [Member]
Burlington Office
Stock Repurchase Program, Number of Shares Authorized to be Repurchased
Stock Repurchase Program, Number of Shares Authorized to be Repurchased
Noncontrolling Interest
Noncontrolling Interest [Member]
Other Restructuring Costs
Other Restructuring Costs