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Income Taxes (Effective Income Tax Rate Reconciliation) (Details)
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12 Months Ended | ||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Income Taxes [Abstract] | |||
| Income taxes (benefit) at statutory rates | 35.00% | 35.00% | 35.00% |
| State income tax, net of federal benefit | 2.45% | 3.46% | 3.16% |
| Permanent items | (2.79%) | (2.68%) | (2.20%) |
| Research and development credits | 3.93% | 2.51% | 2.32% |
| Tax attribute carryover limitation | 0.00% | 0.00% | (4.89%) |
| Other | (2.02%) | (0.36%) | 1.09% |
| Change in valuation allowance | (36.65%) | (37.88%) | (34.45%) |
| Effective tax rate on income (loss) from continuing operations, total | (0.07%) | 0.06% | 0.03% |
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- Definition
Permanent items to reconcile effective tax rate No definition available.
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- Definition
Tax attribute carryover limitation to reconcile effective tax rate No definition available.
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- Definition
A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to changes in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense or benefit, net of the federal tax benefit (expense) thereon, recorded during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by research tax credits generated or utilized under enacted tax laws during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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