Geographic And Customer Information (Geographical Distribution Of Net Sales) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	$ 116,462	$ 90,637	$ 68,980
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	96,822	73,073	48,431
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	8,360	9,249	11,019
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	10,009	7,477	8,187
All Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	$ 1,271	$ 838	$ 1,343