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DERIVATIVE FINANCIAL INSTRUMENTS (Details 2)	Dec. 31, 2020 $ / shares	Jun. 30, 2019 $ / shares
Oil Swaps [Member] \| First quarter [Member]
Price per Bbl
Oil Swaps [Member] \| First quarter [Member] \| Subsequent Event [Member]
Volume (Mbbl)	23.41
Price per Bbl	$ 60.32
Oil Swaps [Member] \| Second quarter [Member]
Price per Bbl
Oil Swaps [Member] \| Second quarter [Member] \| Subsequent Event [Member]
Volume (Mbbl)	23.17
Price per Bbl	$ 59.53
Oil Swaps [Member] \| Third quarter [Member]
Volume (Mbbl)		28.05
Price per Bbl		$ 62.09
Oil Swaps [Member] \| Third quarter [Member] \| Subsequent Event [Member]
Volume (Mbbl)	22.94
Price per Bbl	$ 58.26
Oil Swaps [Member] \| Fourth quarter [Member]
Volume (Mbbl)		24.58
Price per Bbl		$ 61.37
Oil Swaps [Member] \| Fourth quarter [Member] \| Subsequent Event [Member]
Volume (Mbbl)	13.77
Price per Bbl	$ 58.13
Natural Gas Swaps [Member] \| First quarter [Member]
Price per Bbl
Natural Gas Swaps [Member] \| Second quarter [Member]
Price per Bbl
Natural Gas Swaps [Member] \| Third quarter [Member]
Volume (Mbbl)		1.14
Price per Bbl		$ 2.875
Natural Gas Swaps [Member] \| Fourth quarter [Member]
Price per Bbl