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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Provision for Income Taxes | The provision for income taxes for the years ended December 31, 2018, 2017 and 2016, consists of the following (in thousands):
| 2018 |  | 2017 |  | 2016
Current provision: |  |  |  |  |
Federal | $ | (164) |  | $ | 3,074 |  | $ | 4,280
State | (84) |  | 260 |  | 429
Total current (benefit) provision | (248) |  | 3,334 |  | 4,709
Deferred provision: |  |  |  |  |
Federal expense (benefit) | 573 |  | (21,582) |  | (2,713)
Total deferred expense (benefit) | 573 |  | (21,582) |  | (2,713)
Total expense (benefit) provision | $ | 325 |  | $ | (18,248) |  | $ | 1,996
Deferred Tax Assets and Liabilities | The income tax effects of temporary differences that give rise to significant portions of deferred income tax assets and (liabilities) as of December 31, 2018 and 2017, are as follows (in thousands):
| 2018 |  | 2017 |
Deferred income tax assets: |  |  |  |
Net operating loss carryover | $ | 2,415 |  | $ | — |
Stock Compensation | 746 |  | 843 |
Other | 441 |  | 201 |
Total deferred income tax assets | $ | 3,602 |  | $ | 1,044 |
Deferred income tax liabilities: |  |  |  |
Property and equipment | $ | (34,968) |  | (32,377) |
Goodwill and other intangible assets | (573) |  | (604) |
Other | (219) |  | (226) |
Total deferred income tax liabilities | (35,760) |  | (33,207) |
Net deferred income tax liabilities | $ | (32,158) |  | $ | (32,163) |
Effective Income Tax Rate Reconciliation | The effective tax rate for the years ended December 31, 2018, 2017 and 2016, differs from the statutory rate as follows:
| 2018 |  | 2017 |  | 2016
Statutory rate | 21.0 | % |  | 34.0 | % |  | 34.0 | %
State and local taxes | 1.5 | % |  | 1.5 | % |  | 1.6 | %
Uncertain tax position | 72.9 | % |  | — | % |  | — | %
Research and development credit | (48.3) | % |  | — | % |  | (7.5) | %
Stock based compensation | (5.2) | % |  | (13.4) | % |  | 0.3 | %
Nondeductible compensation | 4.1 | % |  | — | % |  | — | %
Domestic production credit | — | % |  | (14.3) | % |  | (5.4) | %
Other | (2.7) | % |  | (1.5) | % |  | 0.6 | %
Effective rate | 43.3 | % |  | 6.3 | % |  | 23.6 | %
Deferred re-measurement for rate change | — | % |  | (1,144.4) | % |  | — | %
Effective rate | 43.3 | % |  | (1,138.1) | % |  | 23.6 | %
Uncertain tax positions | A reconciliation of the beginning and ending amount of uncertain tax positions is as follows (in thousands):
Balance at January 1, 2018 | $ | —
Additions based on tax positions related to current year | 31
Additions to tax positions of prior years | 547
Balance at December 31, 2018 | $ | 578

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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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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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319 + Details
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