Concentrations of Credit Risk (Details) (Distributor [Member])	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Distributor [Member]
Percentage Of Revenue Contributed To Total Revenue By Major Customer	87.50%	82.80%	84.30%	70.50%