Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Schedule of Firm Sales Contracted with Third Parties) (Details)

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COMMITMENTS AND CONTINGENCIES (Schedule of Firm Sales Contracted with Third Parties) (Details)
MMBTU in Thousands
Mar. 31, 2021
MMBTU
Commitments and Contingencies Disclosure [Abstract]  
Remaining 2021 (MMBtu per day) 61
2022 (MMBtu per day) 49
2023 (MMBtu per day) 17
Total (MMBtu per day) 127