Stockholders' Equity (Summary Of The Option And Stock Appreciation Rights Activity) (Details) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013 $1.69 - $116.40 [Member]	Mar. 31, 2014 $4.04 - $5.19 [Member]	Mar. 31, 2014 $1.69 - $67.70 [Member]	Mar. 31, 2014 $1.69 - $116.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options/SARs, Outstanding, December 31, 2013	188,947
Number of Options/SARs, Granted	336,850
Number of Options/SARs, Forfeited	(9,549)
Number of Options/SARs, Outstanding, March 31, 2014	516,248
Weighted Average Exercise Price per Share, Outstanding, December 31, 2013	$ 48.38
Weighted Average Exercise Price per Share, Granted	$ 4.04
Weighted Average Exercise Price per Share, Forfeited	$ 41.82
Weighted Average Exercise Price per Share, Outstanding, March 31, 2014	$ 19.57
Range of Exercise Price, Lower limit		$ 1.69	$ 4.04	$ 1.69	$ 1.69
Range of Exercise Price, Upper limit		$ 116.40	$ 5.19	$ 67.70	$ 116.40