Segment Reporting (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule of revenue by geographic segments
Total	$ 42,039	$ 34,349
% of Total	100.00%	100.00%
United States [Member]
Schedule of revenue by geographic segments
Total	24,147	16,667
% of Total	57.40%	48.50%
Asia [Member]
Schedule of revenue by geographic segments
Total	12,889	10,716
% of Total	30.70%	31.20%
United Kingdom [Member]
Schedule of revenue by geographic segments
Total	1,383	1,478
% of Total	3.30%	4.30%
Germany [Member]
Schedule of revenue by geographic segments
Total	$ 3,620	$ 5,488
% of Total	8.60%	16.00%