Fair Value of Financial Instruments (Schedule of Financial Instruments Measured at Fair Value) (Details) - Fair value measurements recurring - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Level 1
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Lease Guarantees	$ 0	$ 0
Derivative liability	0	0
Level 2
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Lease Guarantees	0	0
Derivative liability	(154)	0
Level 3
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Lease Guarantees	(482)	(734)
Derivative liability	$ 0	$ 0