Inventories (Schedule Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Inventory [Line Items]
Raw materials	$ 4,808	$ 6,202
Work-in process	1,867	1,623
Finished products and components	2,783	2,606
Total	9,458	10,431
Domestic Inventories [Member]
Inventory [Line Items]
Raw materials	3,411	3,698
Work-in process	1,380	1,379
Finished products and components	1,863	2,376
Total	6,654	7,453
Foreign Inventories [Member]
Inventory [Line Items]
Raw materials	1,397	2,504
Work-in process	487	244
Finished products and components	920	230
Total	$ 2,804	$ 2,978