Consolidated Balance Sheets - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 518,000	$ 516,000
Restricted cash	1,000,000	0
Accrued production receivable	91,421,000	139,407,000
Trade and other receivables, net	19,682,000	18,318,000
Derivative assets	187,000	11,936,000
Prepaids	14,038,000	10,434,000
Total current assets	126,846,000	180,611,000
Oil and natural gas properties (using full cost accounting)
Proved properties	851,208,000	11,447,680,000
Unevaluated properties	85,304,000	872,910,000
CO2 properties	188,288,000	1,198,846,000
Pipelines	133,485,000	2,329,078,000
Other property and equipment	86,610,000	212,334,000
Less accumulated depletion, depreciation, amortization and impairment	(41,095,000)	(11,688,020,000)
Net property and equipment	1,303,800,000	4,372,828,000
Operating lease right-of-use assets	20,342,000	34,099,000
Intangible asset, net	97,362,000	22,139,000
Other assets	86,408,000	82,190,000
Total assets	1,634,758,000	4,691,867,000
Current liabilities
Accounts payable and accrued liabilities	112,671,000	183,832,000
Oil and gas production payable	49,165,000	62,869,000
Derivative liabilities	53,865,000	8,346,000
Current maturities of long-term debt (including future interest payable of $0 and $86,054, respectively – see Note 8)	68,008,000	102,294,000
Operating lease liabilities	1,350,000	6,901,000
Total current liabilities	285,059,000	364,242,000
Long-term liabilities
Long-term debt, net of current portion (including future interest payable of $0 and $78,860, respectively – see Note 8)	70,000,000	2,232,570,000
Asset retirement obligations	179,338,000	177,108,000
Derivative liabilities	5,087,000	0
Deferred tax liabilities, net	1,274,000	410,230,000
Operating lease liabilities	19,460,000	41,932,000
Other liabilities	20,872,000	53,526,000
Total long-term liabilities	296,031,000	2,915,366,000
Commitments and contingencies (Note 14)
Stockholders' equity
Preferred stock, $.001 par value	0	0
Common stock, $.001 par value	50,000	508,000
Paid-in capital in excess of par	1,104,276,000	2,739,099,000
Predecessor treasury stock, at cost, 1,652,771 shares		(6,034,000)
Accumulated deficit	(50,658,000)	(1,321,314,000)
Total stockholders' equity	1,053,668,000	1,412,259,000
Total liabilities and stockholders' equity	$ 1,634,758,000	$ 4,691,867,000