Cover Page - shares	6 Months Ended
	Dec. 31, 2023	Feb. 07, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	1-15461
Entity Registrant Name	MATRIX SERVICE CO
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	73-1352174
Entity Address, Address Line One	15 East 5th Street, Suite 1100
Entity Address, City or Town	Tulsa
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74103
City Area Code	918
Local Phone Number	838-8822
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	MTRX
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Emerging Growth Company	false
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		27,304,734
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000866273
Current Fiscal Year End Date	--06-30