Fair Value Measurements And Derivative Instruments (Reconciliation Of Fair Value Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	$ 20,337
Fair value, end of period	8,759	$ 20,337
Series C Preferred Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	13,804
Fair value, end of period	6,271	13,804
Warrant Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	6,533
Fair value, end of period	2,411	6,533
Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	20,337	5,907
Net unrealized (gains) losses on derivatives	$ (11,655)	14,430
Purchases and issuances		151
Sales and settlements, included in derivative gain (loss)		$ (151)
Gross transfers in
Gross transfers out
Fair value, end of period	$ 8,682	$ 20,337
Changes in realized (gains) losses, included in income on instruments held at end of period
Changes in unrealized (gains) losses, included in income on instruments held at end of period	$ (11,655)	$ 14,430
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	13,804	3,761
Net unrealized (gains) losses on derivatives	$ (7,533)	$ 10,043
Purchases and issuances
Sales and settlements, included in derivative gain (loss)
Gross transfers in
Gross transfers out
Fair value, end of period	$ 6,271	$ 13,804
Changes in realized (gains) losses, included in income on instruments held at end of period
Changes in unrealized (gains) losses, included in income on instruments held at end of period	$ (7,533)	$ 10,043
Level 3 [Member] | Warrant Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	6,533	2,146
Net unrealized (gains) losses on derivatives	$ (4,122)	$ 4,387
Purchases and issuances
Sales and settlements, included in derivative gain (loss)
Gross transfers in
Gross transfers out
Fair value, end of period	$ 2,411	$ 6,533
Changes in realized (gains) losses, included in income on instruments held at end of period
Changes in unrealized (gains) losses, included in income on instruments held at end of period	$ (4,122)	$ 4,387
Level 3 [Member] | Convertible Loan Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period
Purchases and issuances		$ 151
Sales and settlements, included in derivative gain (loss)		$ (151)
Gross transfers in
Gross transfers out
Fair value, end of period
Changes in realized (gains) losses, included in income on instruments held at end of period
Changes in unrealized (gains) losses, included in income on instruments held at end of period