Fair Value Measurements (Schedule Of Assets Or Liabilities Measured On Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	$ 5,907	$ 15,935
Net unrealized (gains) losses, included in other income (loss)	(2,115)	317
Purchases, sales, issuances and settlements, net	151	0
Gross transfers in	0	0
Gross transfers out	0	0
Fair value at end of period	3,943	16,252
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	(2,115)	317
Series C Preferred Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	3,761	7,205
Net unrealized (gains) losses, included in other income (loss)	(1,210)	211
Purchases, sales, issuances and settlements, net	0	0
Gross transfers in	0	0
Gross transfers out	0	0
Fair value at end of period	2,551	7,416
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	(1,210)	211
Warrant Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	2,146	8,730
Net unrealized (gains) losses, included in other income (loss)	(905)	106
Purchases, sales, issuances and settlements, net	0	0
Gross transfers in	0	0
Gross transfers out	0	0
Fair value at end of period	1,241	8,836
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	(905)	106
Conversion Loan Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	0	0
Net unrealized (gains) losses, included in other income (loss)	0	0
Purchases, sales, issuances and settlements, net	151	0
Gross transfers in	0	0
Gross transfers out	0	0
Fair value at end of period	151	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