Fair Value Measurements (Schedule Of Financial Liabilities Carried At Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	$ 20,224	$ 20,337	$ 20,224	$ 20,337
Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	0	0	0	0
Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	0	0	0	0
Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	20,224	20,337	20,224	20,337
Series C preferred embedded derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	14,209	13,804	14,209	13,804
Series C preferred embedded derivative [Member] | Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	0	0	0	0
Series C preferred embedded derivative [Member] | Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	0	0	0	0
Series C preferred embedded derivative [Member] | Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	14,209	13,804	14,209	13,804
Warrant derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	6,015	6,533	6,015	6,533
Warrant derivative [Member] | Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	0	0	0	0
Warrant derivative [Member] | Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	0	0	0	0
Warrant derivative [Member] | Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Liability, Current	$ 6,015	$ 6,533	$ 6,015	$ 6,533