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           Stockholders' Equity (Details Textual) (USD $) 
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           Jun. 30, 2013 
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           Dec. 31, 2012 
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| Stockholders' Equity Attributable to Parent [Abstract] | ||
| Common stock, par or stated value per share | $ 0.01 | $ 0.01 | 
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- Definition 
          Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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