| | | December 31, | | ||||
| | | 2017 | | 2016 | | ||
| | | (in thousands) | | ||||
| U.S. Federal: | | | | | | | |
| Current | | $ | - | | $ | - | |
| Deferred | | | 32,579 | | | (2,971) | |
| | | | | | | | |
| State and local: | | | | | | | |
| Current | | | - | | | - | |
| Deferred | | | 1,059 | | | (124) | |
| | | | 33,638 | | | (3,095) | |
| Change in valuation allowance | | | (33,638) | | | 3,095 | |
| Income tax provision | | $ | - | | $ | - | |
| | | December 31, | | ||||
| | | 2017 | | 2016 | | ||
| | | (In thousands) | | ||||
| Deferred tax assets: | | | | | | | |
| Oil and natural gas properties and equipment | | $ | - | | $ | 5,156 | |
| Net operating loss carry-forward | | | 15,653 | | | 42,017 | |
| Share based compensation | | | 784 | | | 2,135 | |
| Abandonment obligation | | | 212 | | | 445 | |
| Derivative instruments | | | 191 | | | - | |
| Accrued liabilities | | | 43 | | | - | |
| Debt conversion costs | | | - | | | 482 | |
| Other | | | 9 | | | 28 | |
| Total deferred tax asset | | | 16,892 | | | 50,263 | |
| Valuation allowance | | | (16,624) | | | (50,263) | |
| Deferred tax asset, net of valuation allowance | | $ | 268 | | $ | - | |
| | | | | | | | |
| Deferred tax liabilities: | | | | | | | |
| Oil and natural gas properties and equipment | | $ | 268 | | $ | - | |
| Total deferred tax liability | | | 268 | | | - | |
| Net deferred tax asset (liability) | | $ | - | | $ | - | |
| | | Year Ended December 31, | | ||||
| | | 2017 | | 2016 | | ||
| Effective federal tax rate | | | 34.00 | % | | 34.00 | % |
| State tax rate, net of federal benefit | | | 1.11 | % | | 1.42 | % |
| Effect of the Tax Cuts and Jobs Act | | | -11.22 | % | | - | % |
| Change in fair value derivative liability | | | -2.59 | % | | -1.32 | % |
| Debt discount amortization | | | -3.51 | % | | -4.11 | % |
| Share based compensation differences and forfeitures | | | 0.91 | % | | -2.28 | % |
| Change in rate | | | -0.05 | % | | -5.90 | % |
| Other permanent differences | | | -4.61 | % | | -12.29 | % |
| NOL true-up - §382 limitation | | | -47.22 | % | | -0.00 | % |
| Other | | | -6.47 | % | | -0.10 | % |
| Valuation allowance | | | 39.65 | % | | -9.42 | % |
| Net | | | - | % | | - | % |