FINANCIAL INFORMATION Revised Consolidated Statements of Operations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net revenues:
Products	$ 99,858	$ 124,991	$ 198,576	$ 252,697
Services	41,487		78,840
Total net revenues	141,345	165,476	277,416	324,627
Cost of revenues:
Products	38,902		75,917
Services	15,392		30,668
Amortization of intangible assets	501		1,152
Total cost of revenues	54,795		107,737
Gross profit	86,550		169,679
Operating expenses:
Research and development	23,847		47,454
Marketing and selling	33,903		67,812
General and administrative	16,131		31,728
Amortization of intangible assets	658		1,321
Restructuring costs, net	1,918		2,191
Loss on sale of assets			(125)
Total operating expenses	76,457		150,506
Operating loss	10,093		19,173
Interest income	122		195
Interest expense	(374)		(709)
Other income, net	5		9
Loss before income taxes	9,846		18,668
Provision for income taxes, net	669		1,226
Net loss	$ 9,177		$ 17,442
Net loss per common share - basic	$ 0.24		$ 0.45
Net loss per common share - diluted	$ 0.23	$ 0.09	$ 0.45	$ 0.50
Weighted-average common shares outstanding - diluted	39,069	38,798	39,061	38,759