Stock-Based Compensation (Details 4) (USD $)	3 Months Ended
	Mar. 31, 2013
Summary of outstanding warrants to purchase common stock
Shares	4,074,542
August 2009 Employee Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Aug. 25, 2009
Exercise Price	$ 0.50
Shares	80,000
Expiration Date	Aug. 25, 2016
2007 Debt Extension Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Sep. 22, 2010
Exercise Price	$ 1.00
Shares	16,000
Expiration Date	Sep. 22, 2015
September 2010 Repricing Warrant [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Sep. 28, 2010
Exercise Price	$ 1.38
Shares	4,000
Expiration Date	Sep. 28, 2013
October 2010 Repricing Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Oct. 18, 2010
Exercise Price	$ 1.38
Shares	2,078,433
Expiration Date	Oct. 18, 2013
October 2010 Employee Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Oct. 15, 2010
Exercise Price	$ 1.38
Shares	920,000
Expiration Date	Oct. 15, 2013
December 2010 Employee Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Dec. 03, 2010
Exercise Price	$ 1.63
Shares	200,000
Expiration Date	Dec. 03, 2015
January 2011 Employee Warrant [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Jan. 21, 2011
Exercise Price	$ 2.00
Shares	20,000
Expiration Date	Jan. 21, 2014
February 2011 Legal Advisor Warrant [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Feb. 22, 2011
Exercise Price	$ 2.50
Shares	80,000
Expiration Date	Feb. 22, 2016
March 2011 Investor Warrants [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Mar. 09, 2011
Exercise Price	$ 3.13
Shares	602,009
Expiration Date	Mar. 09, 2016
March 2011 Investor Warrants One [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Apr. 07, 2011
Exercise Price	$ 3.13
Shares	34,100
Expiration Date	Apr. 07, 2016
May 2011 Consultant Warrant [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	May 17, 2011
Exercise Price	$ 4.05
Shares	20,000
Expiration Date	May 17, 2014
September 2011 Employee Warrant [Member]
Summary of outstanding warrants to purchase common stock
Issue Date	Sep. 12, 2011
Exercise Price	$ 3.90
Shares	20,000
Expiration Date	Sep. 12, 2014