UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 10,944	$ 18,799
Accounts receivable, net (see Note 12)	78,929	91,967
Short-term derivative instruments	442	0
Prepaid expenses and other current assets	16,060	15,018
Total current assets	106,375	125,784
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method	828,691	799,532
Support equipment and facilities	147,358	145,324
Other	9,648	9,641
Accumulated depreciation, depletion and amortization	(652,008)	(634,212)
Property and equipment, net	333,689	320,285
Restricted investments	9,975	4,622
Operating lease - long term right-of-use asset	6,833	2,716
Other long-term assets	1,310	1,693
Total assets	458,182	455,100
Current liabilities:
Accounts payable	25,034	33,819
Revenues payable	25,439	20,374
Accrued liabilities (see Note 12)	59,888	57,826
Short-term derivative instruments	44,867	53,144
Total current liabilities	155,228	165,163
Long-term debt (see Note 7)	205,000	230,000
Asset retirement obligations	107,358	102,398
Long-term derivative instruments	5,684	9,664
Operating lease liability	7,042	2,017
Other long-term liabilities	13,193	10,699
Total liabilities	493,505	519,941
Commitments and contingencies (see Note 14)
Stockholders' equity (deficit):
Preferred stock, $0.01 par value: 50,000,000 shares authorized; no shares issued and outstanding at September 30, 2022 and December 31, 2021	0	0
Warrants, 2,173,913 warrants issued and outstanding at December 31, 2021		4,788
Common stock, $0.01 par value: 250,000,000 shares authorized; 38,440,803 and 38,024,142 shares issued and outstanding at September 30, 2022 and December 31, 2021, respectively	386	382
Additional paid-in capital	431,528	425,066
Accumulated deficit	(467,237)	(495,077)
Total stockholders' deficit	(35,323)	(64,841)
Total liabilities and equity	$ 458,182	$ 455,100