Warrants (Details)	9 Months Ended
	Sep. 30, 2013
Warrants Issued on July 17, 2007 and Expiring on February 9, 2016 [Member]
Schedule of common stock warrants issued and outstanding
Issue Date	Jul. 17, 2007
Shares subject to warrants (shares)	2,384
Exercise Price per Share (dollars per share)	12.45
Expiration	Feb. 09, 2016
Warrants Issued on September 28, 2007 and Expiring on September 28, 2017 [Member]
Schedule of common stock warrants issued and outstanding
Issue Date	Sep. 28, 2007
Shares subject to warrants (shares)	72,727
Exercise Price per Share (dollars per share)	8.25
Expiration	Sep. 28, 2017