Fair Value Measurements And Derivative Instruments (Reconciliation Of Fair Value Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period			$ 8,759
Fair value, end of period	$ 1,426		1,426
Series C Preferred Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period			6,271
Warrant Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period			2,411
Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period		$ 20,224	8,682	$ 20,337
Net (gains) losses recognized in earnings		(7,895)	(6,424)	(8,008)
Purchases and issuances			1,012
Sales and settlements			(1,423)
Gross transfers into Level 3
Gross transfers out of Level 3			(611)
Fair value, end of period	1,236	12,329	1,236	12,329
Total unrealized (gains) losses during the period included in earnings related to instruments held at end of period		(7,895)	224	(8,008)
Level 3 [Member] | Series C Preferred Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period		14,209	6,271	13,804
Net (gains) losses recognized in earnings		(5,217)	(4,848)	(4,812)
Purchases and issuances
Sales and settlements			(1,423)
Gross transfers into Level 3
Gross transfers out of Level 3
Fair value, end of period		8,992		8,992
Total unrealized (gains) losses during the period included in earnings related to instruments held at end of period		(5,217)		(4,812)
Level 3 [Member] | Warrant Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period		6,015	2,411	6,533
Net (gains) losses recognized in earnings		(2,678)	(1,800)	(3,196)
Purchases and issuances
Sales and settlements
Gross transfers into Level 3
Gross transfers out of Level 3			(611)
Fair value, end of period		3,337		3,337
Total unrealized (gains) losses during the period included in earnings related to instruments held at end of period		$ (2,678)		$ (3,196)
Level 3 [Member] | Convertible Debt [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	1,191
Net (gains) losses recognized in earnings	45		224
Purchases and issuances			1,012
Sales and settlements
Gross transfers into Level 3
Gross transfers out of Level 3
Fair value, end of period	1,236		1,236
Total unrealized (gains) losses during the period included in earnings related to instruments held at end of period	$ 45		$ 224