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Stock-Based Compensation (Details Textual) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2012 | Jun. 30, 2012 | Dec. 31, 2011
Investment Options, Exercise Price | $ 6.64 |  |
Percentage of After Two Years Grants | 50.00% |  |
Percentage of After Three Years Grants | 50.00% |  |
Share-based Compensation Arrangement by Share-based Payment Award Estimated Fair Value of Stock Price |  | $ 5.98 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term | 9 years 11 months 0 days | 9 years 8 months 0 days | 0 years
Option Plan 1998 [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Terminated in Period, Gross |  | 7,125 |
Share-based Compensation Shares Authorized Under Stock Option Plans Expire Period |  | 10 years |
Equity Plan 2006 [Member] |  |  |
Share-based Compensations Arrangements Share-based Payment Award Number of Additional Shares Authorized | 54,216 |  |

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- Definition Exercise price of the option. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Footnote 5 + Details
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- Definition The period of time to exercise share-based compensation shares authorized under stock option plans. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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