CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 47,620	$ 0
Accounts receivable, net of allowance for doubtful accounts of $2,215 at September 30, 2020 and $1,103 at December 31, 2019	48,798	71,867
Derivative instruments	57,658	9,166
Other current assets	20,318	19,399
Total current assets	174,394	100,432
Noncurrent assets:
Oil and natural gas properties	1,388,544	1,675,717
Accumulated depletion and amortization	(209,956)	(209,105)
Total oil and natural gas properties, net	1,178,588	1,466,612
Other property and equipment	111,146	135,117
Accumulated depreciation	(28,979)	(25,462)
Total other property and equipment, net	82,167	109,655
Derivative instruments	2,011	525
Other noncurrent assets	9,297	12,974
Total assets	1,446,457	1,690,198
Current liabilities:
Accounts payable and accrued expenses	95,237	151,811
Derivative instruments	337	4,817
Total current liabilities	95,574	156,628
Noncurrent liabilities:
Long-term debt	393,219	394,319
Derivative instruments	1,179	141
Deferred income taxes	9,318	9,057
Asset retirement obligation	136,392	124,019
Other noncurrent liabilities	36,150	33,586
Commitments and Contingencies - Note 4
Equity:
Common stock ($0.001 par value; 750,000,000 shares authorized; 85,004,619 and 84,655,222 shares issued; and 79,892,373 and 79,542,976 shares outstanding, at September 30, 2020 and December 31, 2019, respectively)	85	85
Additional paid-in-capital	912,637	901,830
Treasury stock, at cost, (5,112,246 shares at September 30, 2020 and at December 31, 2019)	(49,995)	(49,995)
Retained earnings (deficit)	(88,102)	120,528
Total equity	774,625	972,448
Total liabilities and equity	$ 1,446,457	$ 1,690,198