CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 163,514	$ 137,260
Restricted cash - other	2,264	2,264
Accounts receivable, net	26,711	21,505
Prepaid expenses	3,141	626
Other current assets	80	80
Total current assets	195,710	161,735
Oil and natural gas properties, using full cost method of accounting
Proved	1,459,713	1,454,016
Unproved	12,478	12,255
Less: accumulated depreciation, depletion and impairment	(1,374,767)	(1,373,217)
Net oil and natural gas properties	97,424	93,054
Other property, plant and equipment, net	96,282	97,791
Other assets	294	332
Total assets	389,710	352,912
Current liabilities
Accounts payable and accrued expenses	47,292	45,779
Derivative contracts	0	21
Asset retirement obligation	17,373	17,606
Other current liabilities	643	627
Total current liabilities	65,308	64,033
Asset retirement obligation	42,554	41,762
Other long-term obligations	1,653	1,795
Total liabilities	109,515	107,590
Commitments and Contingencies
Stockholders’ Equity
Common stock, $0.001 par value; 250,000 shares authorized; 36,726 issued and outstanding at March 31, 2022 and 36,675 issued and outstanding at December 31, 2021	37	37
Warrants	88,520	88,520
Additional paid-in capital	1,062,886	1,062,737
Accumulated deficit	(871,248)	(905,972)
Total stockholders’ equity	280,195	245,322
Total liabilities and stockholders’ equity	$ 389,710	$ 352,912