Accrued Expenses (Schedule Of Accrued Expenses) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accrued Expenses [Abstract]
Compensation expense	$ 672	$ 938
Accrued clinical	429	156
Professional fees	315	274
Supplies	28	53
Other	75
Accrued expenses	$ 1,519	$ 1,421