Basis of Presentation - Additional Information (Details) $ in Thousands		1 Months Ended		3 Months Ended				9 Months Ended
	May 08, 2020 USD ($)	Nov. 30, 2020 bbl	Oct. 31, 2020 $ / bbl bbl	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Nov. 01, 2020 $ / bbl	Jul. 31, 2020	Jul. 02, 2020 USD ($)	Jul. 01, 2020 USD ($)	Jun. 11, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jan. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Non-cash reorganization items								$ 3,072	$ 0
Reduction in capital spending program								65,000
Long-term debt				$ 546,198				546,198							$ 506,202
Senior Secured Credit Facility				285,000				285,000							247,000
Accrued interest – 11.25% Senior Notes				21,094				21,094					$ 14,100		14,063
Percentage of loan held in agreement											0.50
Impairment of oil and gas properties				$ 0		$ 199,900	$ 0	$ 199,908	$ 0
Available newly issued equity interest to be purchased				0.10				0.10
Preferred stock
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Available pro rata share of equity interest				0.03				0.03
Common Stock | Common Class A
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Available pro rata share of equity interest				0.01				0.01
11.25% Senior Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
11.25% Senior Notes due 2023				$ 250,000				$ 250,000							$ 250,000
Debt instrument interest rate (as a percent)				11.25%				11.25%								11.25%
Senior Secured Credit Facility
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Senior Secured Credit Facility				$ 285,000				$ 285,000				$ 285,000
Borrowing deficiency				$ 60,400				$ 60,400				60,400
Debt instrument expanded borrowing base						290,000						$ 225,000	$ 286,000	$ 286,000
First-Out Senior Secured Debt | Revolving Credit Facility
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Exit facility, percentage of outstanding principal amount				0.80				0.80
Maximum borrowing capacity				$ 152,000				$ 152,000
Second-Out Senior Secured Term Loan | Revolving Credit Facility
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Exit facility, percentage of outstanding principal amount				0.20				0.20
Last-Out Senior Secured Term Loan | Revolving Credit Facility
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Exit facility, percentage of outstanding principal amount				1				1
Proved oil And gas properties
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairment of oil and gas properties						199,000
Unproved oil and gas properties
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairment of oil and gas properties						$ 900
PPP loan | Coronavirus Aid, Relief and Economic Security Act
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from sssuance of unsecured debt	$ 2,200				$ 2,200
Subsequent Event | Natural Gas - Henry Hub Swaps Jan - Dec 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Weighted average price - floor | $ / bbl			3.04
Total volume | bbl			10,000
Subsequent Event | Natural Gas Henry Hub Swaps Jan - Dec 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Weighted average price - floor | $ / bbl			2.70
Total volume | bbl			5,000
Subsequent Event | Oil W T I Swaps December 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total volume | bbl		4,000
Weighted average price - swap | $ / bbl										41.08
Subsequent Event | Oil - WTI Swaps January - December 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total volume | bbl		1,000
Weighted average price - swap | $ / bbl										42.20
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reduction in capital spending program								$ 80,000
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reduction in capital spending program								$ 85,000