Fair Value Measurements And Derivative Instruments (Narrative) (Details) - USD ($)		3 Months Ended
	Mar. 16, 2016	Mar. 31, 2016	Mar. 31, 2015	Mar. 11, 2015	Feb. 29, 2012
Fair Value Measurements And Derivative Instruments [Line Items]
Common stock warrants, exercise price				$ 1.52
Net gain on derivatives and convertible debt		$ 6,117,000	$ 4,823,000
Transfers between levels		0	0
Interest Rate Instruments [Member]
Fair Value Measurements And Derivative Instruments [Line Items]
Net gain on derivatives and convertible debt		$ 5,730,000	$ 4,823,000
Series C Preferred Stock [Member]
Fair Value Measurements And Derivative Instruments [Line Items]
Debt instrument original conversion price, per share	$ 1.60				$ 8.00
Warrants [Member]
Fair Value Measurements And Derivative Instruments [Line Items]
Common stock warrants, exercise price	$ 1.92				9.60
Common stock warrants, adjusted exercise price					$ 1.92
Adjustment to additional paid in capital, warrant	$ 611,000
Percentage of adjustment to conversion ratio	120.00%