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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Current assets |  |
Cash and cash equivalents | $ 13,473 | $ 4,275
Restricted cash - other | 1,454 | 1,693
Accounts receivable, net | 16,608 | 28,644
Derivative contracts | 2,004 | 114
Prepaid expenses | 2,218 | 3,342
Assets held for sale | 35,447 | 0
Other current assets | 80 | 538
Total current assets | 71,284 | 38,606
Oil and natural gas properties, using full cost method of accounting |  |
Proved | 1,489,793 | 1,484,359
Unproved | 22,753 | 24,603
Less: accumulated depreciation, depletion and impairment | (1,335,830) | (1,129,622)
Net oil and natural gas properties | 176,716 | 379,340
Other property, plant and equipment, net | 106,665 | 188,603
Other assets | 766 | 1,140
Total assets | 355,431 | 607,689
Current liabilities |  |
Accounts payable and accrued expenses | 41,996 | 64,937
Current maturities of long-term debt | 59,000 | 0
Asset retirement obligation | 22,055 | 22,119
Liabilities held for sale | 403 | 0
Other current liabilities | 1,120 | 1,367
Total current liabilities | 124,574 | 88,423
Long-term debt | 0 | 57,500
Asset retirement obligation | 52,879 | 52,897
Other long-term obligations | 3,209 | 6,417
Total liabilities | 180,662 | 205,237
Commitments and contingencies (Note 9) |  |
Stockholders’ Equity |  |
Common stock, $0.001 par value; 250,000 shares authorized; 35,865 issued and outstanding at June 30, 2020 and 35,772 issued and outstanding at December 31, 2019 | 36 | 36
Warrants | 88,520 | 88,520
Additional paid-in capital | 1,060,019 | 1,059,253
Accumulated deficit | (973,806) | (745,357)
Total stockholders’ equity | 174,769 | 402,452
Total liabilities and stockholders’ equity | $ 355,431 | $ 607,689

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