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Income Taxes (Details) (Federal, Research and development tax credit, USD $)
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3 Months Ended |
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Mar. 31, 2013
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Federal | Research and development tax credit
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| Tax credit carryforward | |
| Research and development credits | $ 2,600,000 |
| Increase (decrease) in valuation allowance | 2,600,000 |
| Income tax benefit | $ 0 |
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The amount of the change in the period in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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