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Income Taxes (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Taxes (Textual) [Abstract]        
Benefit from income taxes $ 0 $ 0 $ 0 $ 0
Effective income tax rate 0.00% 0.00% 0.00% 0.00%
Statutory federal rate     35.00%  
Unrecognized tax benefits 0   0  
Recognized potential interest or penalties with respect to unrecognized tax benefit $ 0   $ 0