Income Taxes (Narrative) (Details) (USD $)
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12 Months Ended | 0 Months Ended | 0 Months Ended | 12 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2011
Federal [Member]
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Dec. 31, 2012
Federal [Member]
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Dec. 31, 2011
California [Member]
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Dec. 31, 2012
California [Member]
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Dec. 31, 2012
Maximum [Member]
Federal [Member]
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Dec. 31, 2012
Maximum [Member]
Research And Development Expense [Member]
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Dec. 31, 2012
Maximum [Member]
California [Member]
|
Dec. 31, 2012
Minimum [Member]
Federal [Member]
|
Dec. 31, 2012
Minimum [Member]
Research And Development Expense [Member]
|
Dec. 31, 2012
Minimum [Member]
California [Member]
|
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Income Tax Examination [Line Items] | |||||||||||||
Income tax provision (benefit) | $ 107,000 | $ 1,295,000 | $ (72,000) | ||||||||||
Prior year income taxes | 100,000 | 600,000 | |||||||||||
Valuation allowance increased/decreased | 6,800,000 | (49,700,000) | 25,200,000 | ||||||||||
Net operating loss carryforwards | 1,007,000,000 | 880,000,000 | |||||||||||
Operating loss carryforwards, expiration dates | 2032 | 2029 | 2032 | 2018 | 2020 | 2013 | |||||||
Research and development tax credits | 75,000,000 | 26,000,000 | |||||||||||
Tax benefit of stock option | 6,200,000 | ||||||||||||
Unrecognized tax benefit would affect the effective tax rate | 100,000 | 126,000 | 0 | ||||||||||
Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 15,000 | 9,000 | |||||||||||
Unrecognized Tax Benefits, Interest on Income Taxes Expense | 6,000 | 9,000 | |||||||||||
Accrued interest | 0 | ||||||||||||
Income Tax Reconciliation, State and Local Income Taxes | $ 74,000 | $ 660,000 | $ 0 |