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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 01, 2019 | Dec. 31, 2019 | Oct. 01, 2019 | Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jun. 30, 2020 | Oct. 02, 2019 | Dec. 31, 2017
CONSOLIDATED BALANCE SHEETS |  |  |  |  |  |  |  |  |  |
Financial Designation, Predecessor and Successor [Fixed List] | Predecessor | Successor | Predecessor | Predecessor | Successor | Successor | Predecessor |  |  |
Current assets: |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 15,546 | $ 5,701 | $ 15,546 |  | $ 4,295 | $ 5,701 |  |  | $ 15,546 |
Accounts receivable, net | 37,826 | 48,504 | 37,826 |  | 32,242 | 48,504 |  |  | 37,826 |
Assets from derivative contracts | 15,310 | 4,995 | 15,310 |  | 8,559 | 4,995 |  |  | 15,310 |
Restricted cash |  | 4,574 |  |  |  | 4,574 |  |  |  |
Prepaids and other | 14,642 | 7,379 | 14,642 |  | 2,740 | 7,379 |  |  | 10,290 |
Total current assets | 84,787 | 71,153 | 84,787 |  | 47,836 | 71,153 |  |  | 92,811 |
Oil and natural gas properties (full cost method): |  |  |  |  |  |  |  |  |  |
Evaluated | 2,155,288 | 420,609 | 2,155,288 |  | 509,274 | 420,609 |  |  | 380,364 |
Unevaluated | 438,365 | 105,009 | 438,365 |  | 75,494 | 105,009 |  |  | 108,954 |
Gross oil and natural gas properties | 2,593,653 | 525,618 | 2,593,653 |  | 584,768 | 525,618 |  |  | 489,318 |
Less - accumulated depletion | (1,709,719) | (19,474) | (1,709,719) |  | (295,163) | (19,474) |  |  |  |
Net oil and natural gas properties | 883,934 | 506,144 | 883,934 |  | 289,605 | 506,144 |  |  | 489,318 |
Other operating property and equipment: |  |  |  |  |  |  |  |  |  |
Other operating property and equipment | 203,373 | 3,655 | 203,373 |  | 3,535 | 3,655 |  |  | 3,655 |
Less - accumulated depreciation | (14,416) | (378) | (14,416) |  | (1,149) | (378) |  |  |  |
Net other operating property and equipment | 188,957 | 3,277 | 188,957 |  | 2,386 | 3,277 |  |  | 3,655 |
Other noncurrent assets: |  |  |  |  |  |  |  |  |  |
Assets from derivative contracts | 4,120 | 224 | 4,120 |  | 4,009 | 224 |  |  | 4,120 |
Operating lease right of use assets | 3,694 | 3,165 | 3,694 |  | 310 | 3,165 |  |  | 3,394 |
Funds in escrow and other | 1,138 | 703 | 1,138 |  | 2,351 | 703 |  |  | 1,138 |
Total assets | 1,166,630 | 584,666 | 1,166,630 |  | 346,497 | 584,666 |  |  | 594,436 |
Current liabilities: |  |  |  |  |  |  |  |  |  |
Accounts payable and accrued liabilities | 112,578 | 97,333 | 112,578 |  | 58,928 | 97,333 |  |  | 115,305 |
Liabilities from derivative contracts | 6,829 | 8,069 | 6,829 |  | 22,125 | 8,069 |  |  | 6,829 |
Current portion of long-term debt, net | 258,234 |  | 258,234 |  | 1,720 |  |  |  |  |
Operating lease liabilities | 1,337 | 923 | 1,337 |  | 403 | 923 |  | $ 500 | 913 |
Asset retirement obligations |  | 109 |  |  |  | 109 |  |  |  |
Total current liabilities | 378,978 | 106,434 | 378,978 |  | 83,176 | 106,434 |  |  | 123,047 |
Long-term debt, net |  | 144,000 |  |  | 158,489 | 144,000 |  |  | 130,000 |
Liabilities subject to compromise | 625,005 |  | 625,005 |  |  |  |  |  |  |
Other noncurrent liabilities: |  |  |  |  |  |  |  |  |  |
Liabilities from derivative contracts | 1,625 | 4,854 | 1,625 |  | 4,291 | 4,854 |  |  | 1,625 |
Asset retirement obligations | 10,153 | 10,481 | 10,153 |  | 10,583 | 10,481 |  |  | 10,153 |
Operating lease liabilities | 2,438 | 2,247 | 2,438 |  |  | 2,247 |  |  | 2,482 |
Commitments and contingencies (Note 12) |  |  |  |  |  |  |  |  |  |
Stockholders' equity: |  |  |  |  |  |  |  |  |  |
Common stock | 16 | 2 | 16 |  | 2 | 2 |  |  | 2 |
Additional paid-in capital | 1,087,441 | 327,108 | 1,087,441 |  | 330,123 | 327,108 |  |  | 327,127 |
Retained earnings (accumulated deficit) | (939,026) | (10,460) | (939,026) |  | (240,167) | (10,460) |  |  |  |
Total stockholders' equity | 148,431 | 316,650 | 148,431 | $ 30,477 | 89,958 | 316,650 | $ 1,197,044 |  | 327,129 | $ 1,071,998
Total liabilities and stockholders' equity | $ 1,166,630 | $ 584,666 | $ 1,166,630 |  | $ 346,497 | $ 584,666 |  |  | $ 594,436 |

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