XML 18 R49.htm IDEA: XBRL DOCUMENT v3.20.1
Supplemental Schedules of Oil and Gas Information - Changes in Standardized Measure of Discounted Future Net Cash Flows From Proved Working Interest Reserve Quantities (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Standardized Measure, Beginning of Year $ 7,860,726 $ 7,061,938
Sales and Transfers, Net of Production Costs (1,836,618) (2,430,324)
Net Change in Sales and Transfer Prices, Net of Production Costs (1,962,275) 2,156,124
Extensions, Discoveries and Improved Recoveries, Net of Future Production and Development Costs 816,539 332,441
Revisions of Quantity Estimates (259,068) 442,030
Accretion of Discount 1,020,105 923,952
Purchases of Reserves in Place 318,332
Net Change in Income Taxes 276,171 (225,892)
Net Change in Asset Retirement Obligation 1,823 (47,659)
Changes in Production Rates (Timing) and Other (756,264) (351,884)
Standardized Measure, End of Year $ 5,479,471 $ 7,860,726