Fair Value Measurements (Schedule Of Valuations Of Investments And Financial Instruments) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative liabilities	$ (8,166,000)	$ (9,245,000)
Volatilty rate, increase or decrease	5.00%
Amount of increase or decrease in liability based on stock volatilty	300,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total derivative liabilities	$ (8,166,000)	$ (9,245,000)