General Information - Additional Information (Detail)	9 Months Ended
Sep. 30, 2022
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 and marketing services agreement with an offshore drilling company.

Description of nature and provision of restrictions as to withdrawal or usage on cash.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 7
-URI https://asc.fasb.org/extlink&oid=126999549&loc=SL98516265-108586

Name:	us-gaap_RestrictedCashNatureOfRestrictionDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration