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Fair Value Measurements and Marketable Securities (Details Textual) (USD $)
Share data in Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
D
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Jun. 30, 2011
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| Fair Value Measurements and Marketable Securities (Textual) [Abstract] | ||||
| Weighted average days to maturity | 204 | |||
| Outstanding warrants to purchase shares of common stock | 12.6 | 12.6 | ||
| Realized gains or losses on available for sale securities | $ 0 | $ 0 | $ 0 | $ 0 |
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Maximum [Member]
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| Schedule of Available-for-sale Securities [Line Items] | ||||
| Available for sale securities, longest maturity date | 2013-12 | |||
| X | ||||||||||
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- Definition
Available for sale securities debt maturities Month. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Weighted Average Days To Maturity No definition available.
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| X | ||||||||||
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- Definition
This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate amount of each class of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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