OPERATING AND GEOGRAPHICAL SEGMENTS (Details 3)	Mar. 31, 2011 Net revenue Customer concentration Maximum	Mar. 31, 2012 Net revenue Credit concentration Customer with largest revenue percentage customer	Mar. 31, 2012 Accounts receivable Credit concentration distributor	Dec. 31, 2011 Accounts receivable Credit concentration distributor	Mar. 31, 2012 Accounts receivable Credit concentration Distributor with largest balance	Dec. 31, 2011 Accounts receivable Credit concentration Distributor with largest balance	Dec. 31, 2011 Accounts receivable Credit concentration Distributor with second largest balance	Mar. 31, 2012 Accounts receivable Credit concentration Distributor with third largest balance
Concentration risk
Threshold for disclosure of major customer (as a percent)	10.00%
Number of Customers with concentration risk		1
Number of distributors with concentration risk			3	2
Percentage of concentration risk		15.00%			15.00%	15.00%	14.00%	11.00%