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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax | Accordingly, the Company has not recognized a benefit for income taxes in the accompanying financial statements. Income tax benefit using the Company’s effective income tax rate differs from the U.S. federal statutory income tax rate due to the following:
|  | 2018 |  |  | 2017 |
|  | (in thousands) |
Income tax benefit at federal statutory rate |  | $ | 218 |  |  | $ | 472 |
State income tax benefit, net of federal impact |  |  | 37 |  |  |  | 38 |
Change in federal tax rate, net of state benefit (1) |  |  | - |  |  |  | (5,440 | )
Change in state tax rate, net of federal benefit |  |  | (435 | ) |  |  |  |
Loss on debt to equity conversion |  |  | - |  |  |  | (1,630 | )
Change in value of warrant |  |  | 163 |  |  |  | - |
Effect of Section 382 limitation |  |  | (1,303 | ) |  |  | (29,803 | )
Incentive stock options and restricted stock not deductible for tax purposes |  |  | - |  |  |  | 964 |
Percentage depletion carryover |  |  | 4 |  |  |  | 138 |
Prior year true up |  |  | 451 |  |  |  | 1,076 |
Other |  |  | 50 |  |  |  | 76 |
Decrease in valuation allowance |  |  | 815 |  |  |  | 34,109 |
Income tax benefit (expense) |  | $ | - |  |  | $ | - |
| (1) | The change in the federal tax rate was due to the passage of Public Law 115-97 (Tax Cuts and Jobs Act). This resulted in a provisional reduction of the Company’s deferred tax assets before valuation analysis primarily due to a reduction in the U.S. statutory rate from 35% to 21%.
Schedule of Deferred Tax Assets and Liabilities | The components of deferred tax assets and liabilities as of December 31, 2018 and 2017 are as follows:
|  | 2018 |  |  | 2017 |
|  | (in thousands) |
Deferred tax assets: |  |  |  |  |  |  |  |
Net operating loss carryover (2) |  | $ | 3,594 |  |  | $ | 874 |
Property and equipment |  |  | 4,306 |  |  |  | 7,123 |
Percentage depletion and contribution carryovers(2) |  |  | 1,721 |  |  |  | 1,872 |
Alternative minimum tax credit carryover (2) |  |  | 42 |  |  |  | 785 |
Equity method investment and other |  |  | 592 |  |  |  | 398 |
Deferred compensation liability |  |  | 9 |  |  |  | 8 |
Asset retirement obligations |  |  | 221 |  |  |  | 221 |
Stock-based compensation |  |  | 61 |  |  |  | 83 |
Total deferred tax assets |  |  | 10,546 |  |  |  | 11,364 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Property and equipment |  |  | - |  |  |  | - |
Other |  |  | - |  |  |  | (3 | )
Total deferred tax liabilities |  |  | - |  |  |  | (3 | )
Net deferred tax assets |  |  | 10,546 |  |  |  | 11,361 |
Less valuation allowance |  |  | (10,546 | ) |  |  | (11,361 | )
Net deferred tax asset |  | $ | - |  |  | $ | - |
| (2) | In December 2017, the Company paid down debt through the issuance of common stock. This issuance represented a 49.3% ownership change in the Company. This change in ownership, combined with other equity events, triggered loss limitations under Internal Revenue Code (“I.R.C.”) Section 382. As a result, the Company wrote-off $29.8 million of gross deferred tax assets in 2017, and an additional $2.4 million in gross deferred tax assets in 2018. Since the Company has maintained a valuation allowance against these tax assets there is no impact to the consolidated statement of operations in either year.

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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