Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 3,671	$ 518
Restricted cash	0	1,000
Accrued production receivable	143,365	91,421
Trade and other receivables, net	19,270	19,682
Derivative assets	0	187
Prepaids	9,099	14,038
Total current assets	175,405	126,846
Oil and natural gas properties (using full cost accounting)
Proved properties	1,109,011	851,208
Unevaluated properties	112,169	85,304
CO2 properties	183,369	188,288
Pipelines	224,394	133,485
Other property and equipment	93,950	86,610
Less accumulated depletion, depreciation, amortization and impairment	(181,393)	(41,095)
Net property and equipment	1,541,500	1,303,800
Operating lease right-of-use assets	19,502	20,342
Intangible asset, net	88,248	97,362
Other assets	78,298	86,408
Total assets	1,902,953	1,634,758
Current liabilities
Accounts payable and accrued liabilities	191,598	112,671
Oil and gas production payable	75,899	49,165
Derivative liabilities	134,509	53,865
Current maturities of long-term debt	0	68,008
Operating lease liabilities	4,677	1,350
Total current liabilities	406,683	285,059
Liabilities, Noncurrent [Abstract]
Long-term debt, net of current portion	35,000	70,000
Asset retirement obligations	284,238	179,338
Derivative liabilities	0	5,087
Deferred tax liabilities, net	1,638	1,274
Operating lease liabilities	17,094	19,460
Other liabilities	22,910	20,872
Total long-term liabilities	360,880	296,031
Commitments and contingencies (Note 14)
Stockholders' equity
Preferred stock, $.001 par value, 50,000,000 shares authorized, none issued and outstanding	0	0
Common stock, $.001 par value, 250,000,000 shares authorized; 50,193,656 and 49,999,999 shares issued, respectively	50	50
Paid-in capital in excess of par	1,129,996	1,104,276
Retained earnings (accumulated deficit)	5,344	(50,658)
Total stockholders' equity	1,135,390	1,053,668
Total liabilities and stockholders' equity	$ 1,902,953	$ 1,634,758