Fair Value Measurements And Derivative Instruments (Schedule Of Fair Value Assets And (Liabilities) Carried At Fair Value And Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	$ 339
Derivative liability		$ (8)
Convertible debt	(1,050)	(1,315)
Total	(711)	(1,323)
Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total	6	(8)
Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Convertible debt	(1,050)	(1,315)
Total	(717)	(1,315)
Interest Rate Instruments [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	6
Derivative liability		(8)
Interest Rate Instruments [Member] | Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	6
Derivative liability		$ (8)
Series E Preferred Embedded Redemption Option [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	333
Series E Preferred Embedded Redemption Option [Member] | Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative asset	$ 333