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Consolidated Statements Of Stockholders' Equity (Deficit) (Parenthetical) (USD $)
In Millions, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
|
Dec. 31, 2001
|
Dec. 31, 2011
|
Dec. 31, 2009
|
Dec. 31, 2008
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Dec. 31, 2005
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Dec. 31, 2003
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Dec. 31, 2002
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| Consolidated Statements Of Stockholders' Equity (Deficit) [Abstract] | |||||||
| Restricted common stock to a founder and member of the board of directors, cash price per share | $ 0.12 | $ 0.96 | |||||
| Issuance of common stock pursuant to exercise of stock options, cash price per share | $ 0.96 | $ 0.96 | |||||
| Initial public offering, cash price per share | $ 42 | ||||||
| Initial public offering, issuance cost | $ 4.6 | ||||||
| Issuance of common stock, cash price per share | $ 62.76 | ||||||
| Issuance of common stock, issuance cost | 2.5 | 1.9 | 4.5 | ||||
| Issuance of common stock and warrants, issuance cost | $ 1.5 | ||||||