Foreign Revenues (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Total foreign revenues	$ 3,613	$ 3,322
Hong Kong [Member]
Segment Reporting Information [Line Items]
Total foreign revenues	531	0
China [Member]
Segment Reporting Information [Line Items]
Total foreign revenues	874	934
Malaysia [Member]
Segment Reporting Information [Line Items]
Total foreign revenues	1,314	1,079
Thailand [Member]
Segment Reporting Information [Line Items]
Total foreign revenues	373	359
All other foreign countries [Member]
Segment Reporting Information [Line Items]
Total foreign revenues	$ 521	$ 950