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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2014
Income Taxes |
Schedule of significant components of deferred tax assets (liabilities) | Significant components of our deferred tax assets (liabilities) as of December 31, 2014 and 2013 are as follows (in thousands):
|  | December 31 |
|  | 2014 |  | 2013 |
Net operating loss carryforwards |  | $ | 32,103 |  | $ | 32,253 |
Net operating loss carryforwards of foreign subsidiaries |  | 374 |  | 374 |
Book over tax depreciation |  | (54 | ) | (43 | )
Stock-based compensation expense |  | 10 |  | 577 |
Other |  | 125 |  | 116 |
Deferred tax assets |  | 32,558 |  | 33,277 |
Valuation allowance for deferred tax assets |  | (32,558 | ) | (33,277 | )
Deferred tax assets, net of allowance |  | $ | — |  | $ | — |
Schedule of differences between the provision for income taxes and income taxes computed using the federal statutory rate | The differences between the provision for income taxes and income taxes computed using the federal statutory rate for the years ended December 31, 2014 and 2013 are as follows (in thousands):
|  | 2014 |  | 2013 |
Reconciliation of income tax benefit to statutory rate: |  |  |  |  |
Income tax (benefit) at statutory rate |  | $ | (93 | ) | $ | 212 |
State income taxes, net of federal income tax benefit |  | 49 |  | 4 |
RTP (ISO expense) |  | 508 |  | — |
Permanent differences |  | 13 |  | 8 |
True-up prior year NOL |  | — |  | (8 | )
Change in valuation allowance |  | (718 | ) | 2,405 |
Change in state tax rate |  | 241 |  | (2,605 | )
Other |  | — |  | (16 | )
|  | $ | — |  | $ | — |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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