Cover - shares	9 Months Ended
	Sep. 25, 2021	Nov. 04, 2021
Cover [Abstract]
Entity Registrant Name	ENGlobal Corporation
Entity Central Index Key	0000933738
Document Type	10-Q
Amendment Flag	false
Current Fiscal Year End Date	--12-28
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Document Period End Date	Sep. 25, 2021
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2021
Entity Common Stock Shares Outstanding		35,208,061
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Entity File Number	001-14217
Entity Incorporation State Country Code	NV
Entity Tax Identification Number	88-0322261
Entity Address Address Line 1	11740 Katy Fwy – Energy Tower III
Entity Address Address Line 2	11th floor
Entity Address City Or Town	Houston
Entity Address State Or Province	TX
Entity Address Postal Zip Code	77079
Security 12b Title	Common Stock, $0.001 par value
Trading Symbol	ENG
Security Exchange Name	NASDAQ
City Area Code	281
Local Phone Number	878-1000