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Oil and Gas Reserves Information (Unaudited) - Summary of Prices Used in Determining Oil and Natural Gas Reserves Quantities and Cash Flows (Detail)	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2018 $ / bbl $ / Mcf	Aug. 13, 2018 $ / Mcf $ / bbl	Dec. 31, 2020 $ / Mcf $ / bbl	Dec. 31, 2018 $ / Mcf $ / bbl
Crude Oil and NGL Per Barrel
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Average sales prices | $ / bbl	55.69	61.21	39.57	62.29
Natural Gas Per Thousand Cubic Feet
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]
Average sales prices | $ / Mcf	2.58	2.90	1.99	2.74

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- Definition

Oil and gas, average sale price and production cost per unit.

+ References

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- Definition

Sales price per unit of oil and gas produced.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1204
-Paragraph (b)
-Subparagraph (1)

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