Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2021
Nov. 09, 2021
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Entity Small Business true  
Entity Emerging Growth Company false  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
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   15,551,891
Entity Interactive Data Current Yes  
Entity File Number 001-34279  
Entity Tax Identification Number 72-1147390  
Entity Address, Address Line One 16225 Park Ten Place  
Entity Address, Address Line Two Suite 300  
Entity Address, City or Town Houston  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77084  
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