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Stock Options (Details 1) (USD $)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Number of Shares, Options exercisable | 2,281,298 | 210,520 | 441,850 |
| Weighted Average Exercise Price, Options exercisable | $ 7.32 | $ 16.44 | $ 14.95 |
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Minimum [Member]
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| Per Share Exercise Price, Options exercisable | $ 2.21 | $ 9.30 | $ 8.27 |
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Maximum [Member]
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| Per Share Exercise Price, Options exercisable | $ 46.87 | $ 26.15 | $ 26.15 |
| X | ||||||||||
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- Definition
Exercise price per share as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. No definition available.
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| X | ||||||||||
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- Definition
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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