Geographic Information (Geographical Distribution Of Net Sales) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	$ 30,134	$ 25,061	$ 85,657	$ 68,800
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	25,157	20,632	70,871	55,521
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	2,068	2,317	6,230	7,102
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	2,472	1,740	7,639	5,541
All Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, net	$ 437	$ 372	$ 917	$ 636