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Subsequent Event	12 Months Ended
Subsequent Event	Dec. 31, 2020
Subsequent Events [Abstract]
Subsequent Event	Note 17. Subsequent Event On March 3, 2021, we closed on an agreement to acquire working interest positions in the Big Sand Draw and Beaver Creek oil fields located in Wyoming, including surface facilities and a CO2 transportation pipeline to the acquired fields, for a cash purchase price of $12 million before closing adjustments.