Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2023	Jul. 31, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Entity Small Business	true
Entity Emerging Growth Company	false
Document Period End Date	Jun. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Entity Registrant Name	Gulf Island Fabrication, Inc.
Entity Central Index Key	0001031623
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Common Stock, Shares Outstanding		16,287,469
Entity Interactive Data Current	Yes
Entity File Number	001-34279
Entity Tax Identification Number	72-1147390
Entity Address, Address Line One	2170 Buckthorne Place
Entity Address, Address Line Two	Suite 420
Entity Address, City or Town	The woodlands
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77380
City Area Code	713
Local Phone Number	714-6100
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	LA
Trading Symbol	Gifi
Title of 12(b) Security	Common Stock
Security Exchange Name	NASDAQ