General Information - Additional Information (Detail) $ in Millions	3 Months Ended
Mar. 31, 2023 USD ($)
Restricted Cash And Cash Equivalents Items [Line Items]
Restricted cash, nature of restriction, description	We maintain a restricted cash bank account which is subject to restrictions pursuant to a management services agreement with an offshore drilling company.
Ocean Valor [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Net book value of assets	$ 1.0

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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