Summary of Significant Accounting Policies (Fair Value of Warrants, Assumptions Used) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Oct. 31, 2012	May 31, 2012
Summary of Significant Accounting Policies [Abstract]
Underlying price of common stock per share	$ 1.89	$ 1.26	$ 2.18	$ 1.22
Exercise price per share	$ 3.62	$ 3.62
Risk-free interest rate	0.11%	0.20%
Dividend yield	0.00%	0.00%
Volatility	72.60%	72.50%
Expected term (in years)	6 months 29 days	1 year 6 months 29 days
Probability of a fundamental transaction, minimum	0.00%	0.00%
Probability of a fundamental transaction, maximum	5.00%	5.00%