CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 2,736	$ 16,449
Accounts receivable, net of allowance	59,277	62,120
Derivative assets	72,236	3,916
Prepayments and other current assets	5,962	3,952
Total current assets	140,211	86,437
Property and equipment - at cost, successful efforts method for oil and gas properties:
Proved oil and gas properties	2,749,042	2,644,129
Unproved oil and gas properties, excluded from amortization	243,309	357,793
Furniture, equipment and other	30,739	29,804
Property, plant and equipment, gross	3,023,090	3,031,726
Accumulated depreciation, depletion, amortization and impairment	(2,235,234)	(967,552)
Total property and equipment, net	787,856	2,064,174
Derivative assets	15,546	0
Other noncurrent assets	8,375	5,441
Total	951,988	2,156,052
Current Liabilities:
Accounts payable and accrued liabilities	42,077	71,638
Amounts payable to oil and gas property owners	25,226	37,922
Production taxes payable	46,985	61,507
Derivative liabilities	0	4,411
Total current liabilities	114,288	175,478
Long-term debt, net of debt issuance costs	794,673	758,911
Asset retirement obligations	23,950	23,491
Deferred income taxes	2,137	97,418
Other noncurrent liabilities	14,761	17,436
Commitments and contingencies (Note 11)
Stockholders’ Equity:
Common stock, $0.001 par value; authorized 400,000,000 shares; 215,409,996 and 213,669,597 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively, with 3,168,704 and 2,968,497 shares subject to restrictions, respectively	212	211
Additional paid-in capital	1,779,906	1,777,779
Retained earnings (accumulated deficit)	(1,777,939)	(694,672)
Treasury stock, at cost: zero shares at June 30, 2020 and December 31, 2019	0	0
Total stockholders’ equity	2,179	1,083,318
Total	$ 951,988	$ 2,156,052