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Common Stock 选项, Warrants And Changes In Capitalization (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
0月结束 | 12个月结束 | 1月结束 | 0月结束 | 96个月结束 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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12月. 24, 2012
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12月. 31, 2012
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12月. 31, 2011
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12月. 31, 2010
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3月. 31, 2012
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3月. 31, 2002
Private Placement [Member]
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12月. 31, 2012
Private Placement [Member]
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12月. 24, 2012
普通股〔成员〕
Public Offering [Member]
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12月. 05, 2011
普通股〔成员〕
Public Offering [Member]
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7月. 15, 2011
普通股〔成员〕
Public Offering [Member]
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3月. 30, 2011
普通股〔成员〕
Public Offering [Member]
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2010年5月25日
普通股〔成员〕
Public Offering [Member]
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2010年5月25日
普通股〔成员〕
Public Offering [Member]
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2010年5月19日
普通股〔成员〕
Public Offering [Member]
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12月. 31, 2012
普通股〔成员〕
1999 Stock Option Plan [Member]
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12月. 31, 2012
普通股〔成员〕
2005 Stock Incentive Plan [Member]
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4月. 20, 2006
普通股〔成员〕
2005 Stock Incentive Plan [Member]
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4月. 19, 2006
普通股〔成员〕
2005 Stock Incentive Plan [Member]
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| Common Stock 选项, Restricted Stock, Warrants And Changes In Capitalization [Line Items] | ||||||||||||||||||
| Number of shares available for grant (shares) | 883,000 | 3,000,000 | 1,904,606 | |||||||||||||||
| Aggregate options granted (shares) | 627,337 | |||||||||||||||||
| Number of options granted (shares) | 997,269 | |||||||||||||||||
| Issuance of common stock in public offering, shares | 11,750,000 | 4,600,000 | 3,450,000 | 2,760,000 | 1,481,481 | |||||||||||||
| Stock option, portion attributable to underwriters (shares) | 750,000 | 187,022 | ||||||||||||||||
| Stock option, portion available to underwriters (shares) | 1,650,000 | |||||||||||||||||
| Share price (usd per share) | $ 38 | $ 29 | $ 28.75 | $ 32 | $ 13.50 | |||||||||||||
| Proceeds from issuance of common stock, net of offering costs, and exercise of stock options | $ 427,900 | $ 427,091 | $ 307,154 | $ 21,879 | $ 427,900 | $ 128,000 | $ 94,700 | $ 84,300 | $ 21,600 | |||||||||
| Private placement offering units | 10,000 | |||||||||||||||||
| Number of shares called by each warrant (shares) | 250 | |||||||||||||||||
| Common stock, par value (usd per share) | $ 0.01 | $ 0.01 | $ 0.01 | |||||||||||||||
| Preferred stock dividend rate | 12.00% | 12.00% | 12.00% | |||||||||||||||
| Preferred stock divinded rate (for stock) | 15.00% | |||||||||||||||||
| 认股权证优秀 | 2,322,962 | |||||||||||||||||
| 认股权证期限 | 10年 | |||||||||||||||||
| Exercise price of warrants issued (usd per share) | 1.19 | |||||||||||||||||
| 认股权证到期 | 8,875 | |||||||||||||||||