Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Significant Accounting Policies [Abstract]

Fair Value of Warrants, Assumptions Used

	2012			2011
Underlying price of common stock per share	$	1.89		$	1.26
Exercise price per share	$	3.62		$	3.62
Risk-free interest rate		0.11	%		0.20	%
Dividend yield		0	%		0	%
Volatility		72.6	%		72.5	%
Expected term (in years)		0.58			1.58
Probability of a fundamental transaction		0%-5%			0%-5%