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Supplementary Oil and Gas Information - Additional Information (Detail)
a in Thousands
Jun. 30, 2020
a
Wells
Disclosure of oil and gas producing activities [line items]  
Operated wells that had multiple completions, gross | Wells 133
Operated wells that had multiple completions, net | Wells 62
Expiring June 2021 [member]  
Disclosure of oil and gas producing activities [line items]  
Approximately acres of undeveloped acreage that will expire, gross 833
Approximately acres of undeveloped acreage that will expire, net 411
Expiring June 2022 [member]  
Disclosure of oil and gas producing activities [line items]  
Approximately acres of undeveloped acreage that will expire, gross 1,089
Approximately acres of undeveloped acreage that will expire, net 655
Expiring June 2023 [member]  
Disclosure of oil and gas producing activities [line items]  
Approximately acres of undeveloped acreage that will expire, gross 264
Approximately acres of undeveloped acreage that will expire, net 256