Income Taxes (Components Of Deferred Tax Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Temporary differences	$ 111	$ 36
Credits	5,330	1,536
Stock compensation	2,630	3,067
Net operating loss carryforwards	15,365	7,715
Total deferred tax assets	23,436	12,354
Valuation allowance	(22,696)	(11,491)
Technology deferred tax liability	(740)	(863)
Net deferred tax assets	$ 740	$ 863