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Supplementary Information - Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Future cash inflows $ 501,431 $ 221,090
Future production costs (207,697) (100,691)
Future development costs (18,507) (39,167)
Future income tax expenses (57,798) (15,135)
Future Net Cash Flows 217,429 66,097
10% annual discount for estimated timing of cash flows (81,623) (24,479)
Standardized Measure of Discounted Future Net Cash Flows $ 135,806 $ 41,619