Fair Value Measurements And Derivative Instruments (Reconciliation Of Fair Value Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 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	$ 1,451		1,451
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		$ 15,514	8,682	$ 20,337
Net (gains) losses recognized in earnings		4,710	(6,469)	(113)
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	1,191	20,224	1,191	20,224
Total unrealized (gains) losses during the period included in earnings related to instruments held at end of period		4,710		(113)
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		10,921	6,271	13,804
Net (gains) losses recognized in earnings		3,288	(4,848)	405
Purchases and issuances
Sales and settlements			(1,423)
Gross transfers into Level 3
Gross transfers out of Level 3
Fair value, end of period		14,209		14,209
Total unrealized (gains) losses during the period included in earnings related to instruments held at end of period		3,288		405
Level 3 [Member] | Warrant Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period		4,593	2,411	6,533
Net (gains) losses recognized in earnings		1,422	(1,800)	(518)
Purchases and issuances
Sales and settlements
Gross transfers into Level 3
Gross transfers out of Level 3
Fair value, end of period		6,015		6,015
Total unrealized (gains) losses during the period included in earnings related to instruments held at end of period		$ 1,422		$ (518)
Level 3 [Member] | Convertible Debt [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	1,399
Net (gains) losses recognized in earnings	(208)		179
Purchases and issuances			1,012
Sales and settlements
Gross transfers into Level 3
Gross transfers out of Level 3
Fair value, end of period	1,191		1,191
Total unrealized (gains) losses during the period included in earnings related to instruments held at end of period	$ (208)		$ 179