Geographic And Customer Information (Geographical Distribution Of Net Sales) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	$ 113,493	$ 113,948	$ 86,954
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	94,530	96,822	73,073
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	5,611	5,846	5,566
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	9,374	10,009	7,477
All Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	$ 3,978	$ 1,271	$ 838