Foreign Revenues (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Foreign revenues [Abstract]
Total foreign revenues	$ 3,937	$ 5,132	$ 7,259	$ 9,979
China [Member]
Foreign revenues [Abstract]
Total foreign revenues	910	1,675	1,844	2,952
Malaysia [Member]
Foreign revenues [Abstract]
Total foreign revenues	1,339	1,385	2,418	2,998
Thailand [Member]
Foreign revenues [Abstract]
Total foreign revenues	403	420	762	714
All other foreign countries [Member]
Foreign revenues [Abstract]
Total foreign revenues	$ 1,285	$ 1,652	$ 2,235	$ 3,315