COMMITMENTS AND CONTINGENCIES - Schedule of Minimum Quantities of Crude Oil under the Canceled Contract (Details) - ARM Energy Management, LLC	Sep. 30, 2020 bbl
March 2019 - June 2019
Long-term Purchase Commitment [Line Items]
Crude oil takeaway, target number of barrels per day (in barrels per day)	5,000
July 2019 - December 2019
Long-term Purchase Commitment [Line Items]
Crude oil takeaway, target number of barrels per day (in barrels per day)	4,000
January 2020 - June 2020
Long-term Purchase Commitment [Line Items]
Crude oil takeaway, target number of barrels per day (in barrels per day)	5,000
July 2020 - June 2021
Long-term Purchase Commitment [Line Items]
Crude oil takeaway, target number of barrels per day (in barrels per day)	6,000
July 2021 - December 2024
Long-term Purchase Commitment [Line Items]
Crude oil takeaway, target number of barrels per day (in barrels per day)	7,500	[1]

[1] (1)Extending to the later of December 2024 or 5 years from the EPIC Crude Oil pipeline in-service date (February 2025).