Accrued Expenses (Schedule Of Accrued Expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accrued Expenses [Abstract]
Compensation expense	$ 938	$ 685
Accrued clinical	156	21
Professional fees	274	211
Supplies	53	65
Other		52
Accrued expenses	$ 1,421	$ 1,034