13. Concentrations (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenue Concentration Customer1	13.00%	13.00%	12.00%	14.00%
Revenue Concentration Customer2	9.00%	10.00%	10.00%	9.00%