Significant Customers (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended									12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Sales [Member] Customer Concentration Risk [Member] World wide distributors 1 [Member]	Mar. 31, 2012 Sales [Member] Customer Concentration Risk [Member] World wide distributors 1 [Member]	Mar. 31, 2013 Sales [Member] Customer Concentration Risk [Member] World wide distributors 2 [Member]	Mar. 31, 2012 Sales [Member] Customer Concentration Risk [Member] World wide distributors 2 [Member]	Mar. 31, 2012 Sales [Member] Customer Concentration Risk [Member] Direct Customer [Member]	Mar. 31, 2013 Accounts Receivable [Member] Customer Concentration Risk [Member] World wide distributors 1 [Member]	Mar. 31, 2013 Accounts Receivable [Member] Customer Concentration Risk [Member] World wide distributors 2 [Member]	Dec. 31, 2012 Accounts Receivable [Member] Customer Concentration Risk [Member] Worldwide Distributor [Member]	Dec. 31, 2012 Accounts Receivable [Member] Customer Concentration Risk [Member] Asian based stocking [Member]
Revenue, Major Customer [Line Items]
Net revenues	$ 59,733	$ 61,151	$ 18,500	$ 15,700	$ 12,500	$ 9,400	$ 8,100
Concentration risk, percentage			31.00%	26.00%	21.00%	15.00%	13.00%	35.00%	14.00%	28.00%	14.00%