FINANCIAL INFORMATION Revised Consolidated Statements of Operations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net revenues:
Products	$ 98,718	$ 127,706
Services	37,353
Total net revenues	136,071	159,151
Cost of revenues:
Products	37,015
Services	15,276
Amortization of intangible assets	651
Total cost of revenues	52,942
Gross profit	83,129
Operating expenses:
Research and development	23,607
Marketing and selling	33,909
General and administrative	15,597
Amortization of intangible assets	663
Restructuring costs, net	273
Loss on sale of assets	(125)
Total operating expenses	74,049
Operating loss	9,080
Interest income	73
Interest expense	(335)
Other income (expense), net	4
Loss before income taxes	8,822
Provision for income taxes, net	557
Net loss	$ 8,265
Net loss per common share - basic	$ 0.21
Net loss per common share - diluted	$ 0.21	$ 0.41
Weighted-average common shares outstanding - diluted	39,034	38,721