Stockholders' Equity (Details) (Warrant [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Warrant [Member]
Summary of warrant activity
Balance at beginning of year, Number of Warrants	220,158	252,465
Issued, Number of Warrants	73,386
Exercised, Number of Warrants	(73,386)	(32,307)
Forfeited, Number of Warrants	(220,158)
Balance at end of year, Number of Warrants		220,158
Warrants exercisable at end of year, Number of Warrants		220,158
Balance at beginning of year, Weighted Average Exercise Price	$ 15.73	$ 15.73
Issued, Weighted Average Exercise Price	$ 2.70
Exercised, Weighted Average Exercise Price	$ (2.70)	$ 15.60
Cancelled, Weighted Average Exercise Price	$ (15.73)
Balance at end of year, Weighted Average Exercise Price		$ 15.73
Warrants exercisable at end of year, Weighted Average Exercise Price		$ 15.73