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, 2020	Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Interest rate derivatives	$ (1,132)	$ (366)
Series E Preferred embedded redemption option		22
Convertible debt	(1,032)	(1,080)
Total	(2,164)	(1,424)
Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Interest rate derivatives	(1,132)	(366)
Total	(1,132)	(366)
Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Series E Preferred embedded redemption option		22
Convertible debt	(1,032)	(1,080)
Total	$ (1,032)	$ (1,058)