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Stock-Based Compensation (Details Textual) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Jun. 06, 2012
Stock-Based Compensation (Textual) [Abstract] |  |  |  |  |
Aggregate number of shares of common stock reserved for future issuance | 13,000,000 |  | 13,000,000 |  |
Options and Other Stock Based Awards | 8,800,000 |  | 8,800,000 |  |
2008 Equity Incentive Plan [Member] |  |  |  |  |
Stock-Based Compensation (Textual) [Abstract] |  |  |  |  |
Increase in stock-based compensation, common stock authorized |  |  |  |  | 3,000,000
Maximum number of shares of common stock authorized for issuance |  |  |  |  | 13,540,940
Number of shares available for future issuance | 4,200,000 |  | 4,200,000 |  |
Performance-based stock options, outstanding | 100,000 |  | 100,000 |  |
Stock-based compensation associated with performance-based stock options | $ 0 | $ 0 | $ 0 | $ 0 |
Employee Stock Purchase Plan [Member] |  |  |  |  |
Stock-Based Compensation (Textual) [Abstract] |  |  |  |  |
Increase In Shares of Common Stock Authorized for Issuance |  |  |  |  | 500,000
Maximum number of shares of common stock authorized for issuance |  |  |  |  | 1,320,500
Number of shares available for future issuance | 600,000 |  | 600,000 |  |

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- Definition Stockholder approved to increase the aggregate number of shares of common stock authorized for issuance under an equity incentive plan. + References No definition available. + Details
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- Definition Stockholder approved increase to in stock based compensation common stock authorized. + References No definition available. + Details
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- Definition Number of shares available for future issuance. + References No definition available. + Details
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- Definition Outstanding options and other stock-based awards under equity incentive plans other than the employee stock purchase plan + References No definition available. + Details
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- Definition Performance-based stock options outstanding. + References No definition available. + Details
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- Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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