Foreign Revenues (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Total foreign revenues	$ 3,767	$ 5,788	$ 11,026	$ 15,767
China [Member]
Segment Reporting Information [Line Items]
Total foreign revenues	984	2,236	2,828	5,188
Malaysia [Member]
Segment Reporting Information [Line Items]
Total foreign revenues	1,069	1,662	3,487	4,660
Thailand [Member]
Segment Reporting Information [Line Items]
Total foreign revenues	446	749	1,208	1,463
All other foreign countries [Member]
Segment Reporting Information [Line Items]
Total foreign revenues	$ 1,268	$ 1,141	$ 3,503	$ 4,456