Segment Customer Concentration and Geographical Information (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Customer One [Member]
Segment, Customer Concentration and Geographical Information (Textual) [Abstract]
Percentage contribution to total revenue	39.90%	33.80%	36.00%	23.10%
Customer Two [Member]
Segment, Customer Concentration and Geographical Information (Textual) [Abstract]
Percentage contribution to total revenue	15.60%	18.40%	20.60%	19.20%
Customer Three [Member]
Segment, Customer Concentration and Geographical Information (Textual) [Abstract]
Percentage contribution to total revenue		11.40%		12.10%
Customer Four [Member]
Segment, Customer Concentration and Geographical Information (Textual) [Abstract]
Percentage contribution to total revenue				11.30%