Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of revenue by geographic segments
Total	$ 37,982	$ 30,695	$ 110,827	$ 91,490
% of Total	100.00%	100.00%	100.00%	100.00%
United States [Member]
Schedule of revenue by geographic segments
Total	20,045	14,758	57,963	41,969
% of Total	52.80%	48.10%	52.20%	45.90%
Asia [Member]
Schedule of revenue by geographic segments
Total	11,511	10,259	33,982	31,762
% of Total	30.30%	33.40%	30.70%	34.70%
United Kingdom [Member]
Schedule of revenue by geographic segments
Total	1,066	1,211	3,740	4,014
% of Total	2.80%	3.90%	3.40%	4.40%
Germany [Member]
Schedule of revenue by geographic segments
Total	$ 5,360	$ 4,467	$ 15,142	$ 13,745
% of Total	14.10%	14.60%	13.70%	15.00%