Property And Equipment (Schedule Of Property And Equipment) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Equipment, gross	$ 2,914	$ 462
Less: Accumulated depreciation	(184)	(145)
Equipment, net	2,730	317
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	2,228
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	457	425
Software [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	31	20
Furniture, Fixtures, And Equipment [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	$ 198	$ 17