Accrued Expenses (Schedule Of Accrued Expenses) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accrued Expenses [Abstract]
Compensation expense	$ 1,011	$ 938
Accrued clinical	389	156
Professional fees	211	274
Supplies	92	53
Accrued expenses	$ 1,703	$ 1,421