RESTATEMENT OF PREVIOUSLY FILED FINANCIAL INFORMATION - DERIVATIVE FINANCIAL INSTRUMENTS (Details)	Dec. 31, 2019 bbl $ / bbl	Sep. 30, 2019 bbl $ / bbl	Jun. 30, 2019 bbl $ / bbl	Mar. 31, 2019 bbl $ / bbl
Commodity Contract
Barrels per day | bbl	1,000	1,500	1,500	1,500
Commodity Contract | Put Option
Put price	50.00	50.00	50.00	50.00
Commodity Contract | Call Option
Call price	65.83	66.00	66.00	66.00
Commodity Contract A
Barrels per day | bbl	1,000	500	500	500
Commodity Contract A | Put Option
Put price	50.00	50.00	50.00	50.00
Commodity Contract A | Call Option
Call price	65.40	67.40	67.40	67.40
Commodity Contract B
Barrels per day | bbl	1,000	500	500	500
Commodity Contract B | Put Option
Put price	50.00	50.00	50.00	50.00
Commodity Contract B | Call Option
Call price	58.40	67.90	67.90	67.90
Commodity Contract C
Barrels per day | bbl	1,000	1,000	1,000	1,000
Commodity Contract C | Put Option
Put price	50.00	50.00	50.00	50.00
Commodity Contract C | Call Option
Call price	58.25	68.71	68.71	68.71
Commodity Contract D
Barrels per day | bbl	1,500	1,000	1,000
Commodity Contract D | Put Option
Put price	50.00	50.00	50.00
Commodity Contract D | Call Option
Call price	58.65	69.50	69.50
Commodity Contract E
Barrels per day | bbl		1,000	1,000
Commodity Contract E | Put Option
Put price		50.00	50.00
Commodity Contract E | Call Option
Call price		70.20	70.20
Commodity Contract F
Barrels per day | bbl		1,000	1,000
Commodity Contract F | Put Option
Put price		50.00	50.00
Commodity Contract F | Call Option
Call price		65.83	65.83
Commodity Contract G
Barrels per day | bbl		1,000	1,000
Commodity Contract G | Put Option
Put price		50.00	50.00
Commodity Contract G | Call Option
Call price		65.40	65.40