Gulf Island Fabrication, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Shipyard Transaction and Discontinued Operations - Additional Information (Details)

Shipyard Transaction and Discontinued Operations - Additional Information (Details)		3 Months Ended			9 Months Ended		12 Months Ended
	Apr. 19, 2021 USD ($) Vechicle vessel Ship_project drydock	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Asset impairments					$ 484,000	$ 22,750,000
Liabilities		$ 33,389,000	$ 31,365,000		33,389,000		$ 31,365,000
Shipyard Transactions
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of research vessels projects \| vessel	3
Number of divested shipyard contracts \| Ship_project	5
Number of drydocks \| drydock	4
Number of drydocks previously supported for shipyard division operations \| drydock	3
Number of MPSV projects \| vessel	2
Asset impairments						22,800,000
Transaction and other costs						$ 2,600,000
Material operating results of discontinued operations		0			0
Material assets of discontinued operations		0	0		0		0
Material liabilities of discontinued operations		0	0		0		0
Shipyard Transactions \| Retained Shipyard Contracts And Other Shipyard Division Liabilities
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Liabilities		1,200,000	8,700,000		$ 1,200,000		8,700,000
Shipyard Transactions \| Forty-Vehicle Ferry
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Number of vehicle ferry projects \| Vechicle	2
Bollinger \| Shipyard Transactions
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Transaction price	$ 28,600,000
Net of estimated transaction and other costs	$ 26,100,000
Transaction price on closing date		$ 900,000	$ 1,300,000	$ 26,400,000			$ 27,700,000
Estimate change in working capital for divested shipyard contracts				$ 7,800,000