Warrants (Schedule Of Changes In Warrants Activity) (Details) - Warrant [Member]	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Warrants [Line Items]
Beginning Balance | shares	1,740,265
Granted | shares	587,500
Expired on June 21, 2015 | shares	(1,321,086)
Ending Balance | shares	1,006,679
Weighted average exercise price, Beginning Balance	$ 42.26
Weighted average exercise price, Granted	9.57
Weighted average exercise price, Expired on June 21, 2015	50.55
Weighted average exercise price, Ending Balance	12.92
Minimum [Member]
Warrants [Line Items]
Exercise price range, Beginning Balance	9.40
Exercise price range, Granted	5.00
Exercise price range, Expired on June 21, 2015	9.40
Exercise price range, Ending Balance	10.00
Maximum [Member]
Warrants [Line Items]
Exercise price range, Beginning Balance	50.60
Exercise price range, Granted	10.00
Exercise price range, Expired on June 21, 2015	50.60
Exercise price range, Ending Balance	$ 17.60