Inventories (Schedule Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Inventory [Line Items]
Raw materials	$ 5,662	$ 6,202
Work-in process	2,015	1,623
Finished products and components	1,723	2,606
Total	9,400	10,431
Domestic Inventories [Member]
Inventory [Line Items]
Raw materials	3,548	3,698
Work-in process	1,173	1,379
Finished products and components	1,604	2,376
Total	6,325	7,453
Foreign Inventories [Member]
Inventory [Line Items]
Raw materials	2,114	2,504
Work-in process	842	244
Finished products and components	119	230
Total	$ 3,075	$ 2,978