Equipment (Schedule Of Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Equipment, gross	$ 462		$ 462
Less: Accumulated depreciation	(169)		(145)
Equipment, net	293		317
Depreciation expense	24	$ 22
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	425		425
Software [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	20		20
Furniture, Fixtures, And Equipment [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	$ 17		$ 17