Net Loss Per Share (Schedule Of Anti-Dilutive Securities Excluded From Computation Of Diluted Earnings Per Share) (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common shares excluded from the computation of diluted earnings per share	78,138,047	3,578,867
Stock Options And Stock Appreciation Rights [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common shares excluded from the computation of diluted earnings per share	671,887	706,494
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common shares excluded from the computation of diluted earnings per share	37,335,618
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common shares excluded from the computation of diluted earnings per share	1,167,099	752,008
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common shares excluded from the computation of diluted earnings per share	38,963,443	2,120,365