Stockholders' Equity (Summary Of Option And Stock Appreciation Rights Activity) (Details) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options/SARs, Outstanding, December 31, 2014	487,146
Number of Options/SARs, Granted	353,350
Number of Options/SARs, Exercised
Number of Options/SARs, Forfeited	(89,791)
Number of Options/SARs, Outstanding, September 30, 2015	750,705	487,146
Weighted Average Exercise Price per Share, Outstanding, December 31, 2014	$ 17.21
Weighted Average Exercise Price per Share, Granted	$ 2.07
Weighted Average Exercise Price per Share, Exercised
Weighted Average Exercise Price per Share, Forfeited	$ 23.58
Weighted Average Exercise Price per Share, Outstanding, September 30, 2015	9.32	$ 17.21
$1.69 - $116.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price, Lower limit		1.69
Range of Exercise Price, Upper limit		$ 116.40
$1.45 - $2.15 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price, Lower limit	1.45
Range of Exercise Price, Upper limit	2.15
$1.69 - $91.90 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price, Lower limit	1.69
Range of Exercise Price, Upper limit	91.90
$1.45 - $116.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price, Lower limit	1.45
Range of Exercise Price, Upper limit	$ 116.40