Joint Venture and Consortium Arrangements - Summary of Aggregate Financial Information (Detail) - CLG and Qingdao McDermott Wuchuan Offshore Engineering Company Ltd [Member] - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Schedule Of Equity Method Investments [Line Items]
Revenues		$ 56	$ 2	$ 56	$ 2
Cost of operations		(45)		(45)
Gross profit		11	2	11	2
Income (loss) from operations		4	(2)	1	(4)
Net income (loss)	[1]	$ 3	$ (3)	$ (2)	$ (8)

[1] Includes results for CLG from the Combination Date.