Warrants (Summary of Warrant Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Warrants Summary Of Warrant Activity Details
Warrants, Outstanding as of beginning of period	2,287,000	1,042,000
Granted with exercise price greater than intrinsic value	3,100,000	1,278,000
Exercised	0	0
Canceled/expired	(256,000)	(33,000)
Warrants, Outstanding as of end of period	5,131,000	2,287,000
Warrants, Weighted-Average Exercise Prices, Outstanding as of beginnig of period	22.08	25.84
Warrants, Weighted-Average Exercise Prices, Granted	$ 2.48	$ 6.24
Warrants, Weighted-Average Exercise Prices, Exercised	0	0
Warrants, Weighted-Average Exercise Prices, cancelled or expired	$ 17.60	$ 22.08
Warrants, Weighted-Average Exercise Prices, Outstanding as of end of period	7.28	22.08
Warrants, Exercisable at end of period	3,031,000
Warrants, Weighted-Average Exercise Price, Exercisable	$ 10.49