CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 222,359	$ 255,722
Restricted cash - other	1,668	1,746
Accounts receivable, net	23,908	34,735
Derivative contracts	0	4,429
Prepaid expenses	1,815	523
Other current assets	4,744	7,747
Total current assets	254,494	304,902
Oil and natural gas properties, using full cost method of accounting
Proved	1,527,475	1,507,690
Unproved	11,565	11,516
Less: accumulated depreciation, depletion and impairment	(1,385,569)	(1,380,574)
Net oil and natural gas properties	153,471	138,632
Other property, plant and equipment, net	89,295	92,244
Other assets	272	190
Deferred tax assets	64,529	64,529
Total assets	562,061	600,497
Current liabilities
Accounts payable and accrued expenses	39,506	46,335
Asset retirement obligation	15,647	16,074
Other current liabilities	691	870
Total current liabilities	55,844	63,279
Asset retirement obligation	49,434	47,635
Other long-term obligations	2,085	1,661
Total liabilities	107,363	112,575
Commitments and contingencies (Note 6)
Shareholders’ Equity
Common stock, $0.001 par value; 250,000 shares authorized; 36,966 issued and outstanding at June 30, 2023 and 36,868 issued and outstanding at December 31, 2022	37	37
Additional paid-in capital	1,078,070	1,151,689
Accumulated deficit	(623,409)	(663,804)
Total shareholders’ equity	454,698	487,922
Total liabilities and shareholders’ equity	$ 562,061	$ 600,497