Accrued Expenses (Schedule Of Accrued Expenses) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accrued Expenses [Abstract]
Professional fees	$ 176	$ 285
Compensation expense	365	261
Clinical trials	89
Other	188	205
Accrued expenses	$ 818	$ 751