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股票报酬（按行权价格计算的股票期权计划摘要）（详情）（美元）
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6 Months Ended |
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Jun. 30, 2013
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| Share-based Compensation, 股票期权计划授权的股份, Exercise Price Range [Line Items] | |
| Number Outstanding (shares) | 210,241 |
| Number Exercisable (shares) | 210,241 |
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Exercise Price $3.36 [Member]
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| Share-based Compensation, 股票期权计划授权的股份, Exercise Price Range [Line Items] | |
| Exercise Price (usd per share) | $ 3.36 |
| Number Outstanding (shares) | 205,241 |
| 加权平均剩余寿命（年） | 1 year 6 months 22 days |
| Number Exercisable (shares) | 205,241 |
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Exercise Price $9.07 [Member]
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| Share-based Compensation, 股票期权计划授权的股份, Exercise Price Range [Line Items] | |
| Exercise Price (usd per share) | $ 9.07 |
| Number Outstanding (shares) | 5,000 |
| 加权平均剩余寿命（年） | 2 years 2 months 9 days |
| Number Exercisable (shares) | 5,000 |
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- Definition
在资产负债表日，受让人可以就所有已发行股票期权（在订定的行权价格范围内）取得标的股票的价格. No definition available.
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- Details
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- Definition
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
在自定义的行权价格范围内的所有期权计划中，截至资产负债表日，保留用于发行的与已发行股票期权有关的股票数量. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
已发行股票期权的加权平均剩余合同期限, in 'PnYnMnDTnHnMnS' format, for example, ‘P1Y5M13D’代表一年的报告事实, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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