Fair Value Measurements (Schedule Of Assets Or Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	$ 20,224	$ 15,510	$ 20,337	$ 5,907
Net unrealized (gains) losses, included in other income (loss)	(7,895)	4,615	(8,008)	14,218
Purchases and issuances	0	0	0	151
Sales and settlements, included in derivative gain (loss)	0	0	0	(151)
Gross transfers in	0	0	0	0
Gross transfers out	0	0	0	0
Fair value, end of period	12,329	20,125	12,329	20,125
Changes in realized (gains) losses included in income on instruments held at end of period	0	0	0	0
Changes in unrealized (gains) losses included in income on instruments held at end of period	(7,895)	4,615	(8,008)	14,218
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	10,297	13,804	3,761
Net unrealized (gains) losses, included in other income (loss)	(5,217)	3,277	(4,812)	9,813
Purchases and issuances	0	0	0	0
Sales and settlements, included in derivative gain (loss)	0	0	0	0
Gross transfers in	0	0	0	0
Gross transfers out	0	0	0	0
Fair value, end of period	8,992	13,574	8,992	13,574
Changes in realized (gains) losses included in income on instruments held at end of period	0	0	0	0
Changes in unrealized (gains) losses included in income on instruments held at end of period	(5,217)	3,277	(4,812)	9,813
Warrant derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period	6,015	5,213	6,533	2,146
Net unrealized (gains) losses, included in other income (loss)	(2,678)	1,338	(3,196)	4,405
Purchases and issuances	0	0	0	0
Sales and settlements, included in derivative gain (loss)	0	0	0	0
Gross transfers in	0	0	0	0
Gross transfers out	0	0	0	0
Fair value, end of period	3,337	6,551	3,337	6,551
Changes in realized (gains) losses included in income on instruments held at end of period	0	0	0	0
Changes in unrealized (gains) losses included in income on instruments held at end of period	(2,678)	1,338	(3,196)	4,405
Conversion Loan Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period			0	0
Net unrealized (gains) losses, included in other income (loss)			0	0
Purchases and issuances			0	151
Sales and settlements, included in derivative gain (loss)			0	(151)
Gross transfers in			0	0
Gross transfers out			0	0
Fair value, end of period	$ 0	$ 0	0	0
Changes in realized (gains) losses included in income on instruments held at end of period			0	0
Changes in unrealized (gains) losses included in income on instruments held at end of period			$ 0	$ 0