Inventories (Schedule Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Inventory [Line Items]
Raw materials	$ 5,505	$ 5,662
Work-in process	2,238	2,015
Finished products and components	1,937	1,723
Total	9,680	9,400
Domestic Inventories [Member]
Inventory [Line Items]
Raw materials	3,602	3,548
Work-in process	1,271	1,173
Finished products and components	1,615	1,604
Total	6,488	6,325
Foreign Inventories [Member]
Inventory [Line Items]
Raw materials	1,903	2,114
Work-in process	967	842
Finished products and components	322	119
Total	$ 3,192	$ 3,075