Organization And Summary Of Significant Accounting Policies (Schedule Of Assets Or Liabilities Measured On Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period				$ 5,907				$ 15,935	$ 5,907	$ 15,935
Net Realized and Unrealized Gains (Losses) Included in Income	212	4,615	11,718	(2,115)	(5,534)	(2,674)	(2,137)	317	14,430	(10,028)	247
Purchases and issuances									151	0
Sales and settlements, included in derivative gain (loss)									(151)	0
Gross transfers in									0	0
Gross transfers out									0	0
Fair value, end of period	20,337				5,907				20,337	5,907	15,935
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									14,430	(10,028)
Series C Preferred Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period				3,761				7,205	3,761	7,205
Net Realized and Unrealized Gains (Losses) Included in Income									(10,043)	3,444
Purchases and issuances									0	0
Sales and settlements, included in derivative gain (loss)									0	0
Gross transfers in									0	0
Gross transfers out									0	0
Fair value, end of period	13,804				3,761				13,804	3,761
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									10,043	(3,444)
Warrant Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period				2,146				8,730	2,146	8,730
Net Realized and Unrealized Gains (Losses) Included in Income									(4,387)	6,584
Purchases and issuances									0	0
Sales and settlements, included in derivative gain (loss)									0	0
Gross transfers in									0	0
Gross transfers out									0	0
Fair value, end of period	6,533				2,146				6,533	2,146
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									4,387	(6,584)
Convertible Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, beginning of period				0				0	0	0
Net Realized and Unrealized Gains (Losses) Included in Income									0	0
Purchases and issuances									151	0
Sales and settlements, included in derivative gain (loss)									(151)	0
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