Inventories (Schedule Of Inventories At Cost, Net Of Reserves) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Inventories [Abstract]
Raw materials	$ 3,025	$ 3,146
Work-in-progress	11,433	10,828
Finished goods	1,512	1,621
Inventory at cost	15,970	15,595
Inventory reserves	(4,657)	(4,671)
Total	$ 11,313	$ 10,924