RESTATEMENT OF CONSOLIDATED FINANCIAL STATEMENTS Adjustments to Condensed Consolidated Statement 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
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
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
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 Charges	1,918		2,191
Total operating expenses	76,457		150,506
Operating (loss) income	10,093		19,173
Interest income	122		195
Interest expense	(374)		(709)
Other income, net	5		9
(Loss) income from continuing operations before income taxes	9,846		18,668
Provision for income taxes, net	669		1,226
(Loss) income from continuing operations, net of tax	9,177		17,442
Income from divested operations	0		0
Income from discontinued operations, net of tax	0		0
Net (loss) income	9,177		17,442
Weighted-average common shares outstanding – diluted	39,069	38,798	39,061	38,759
Restatement Adjustment [Member]
Products		25,270		55,834
Services		6,080		5,323
Total net revenues		31,350		61,157
Products		0		0
Services		0		0
Amortization of intangible assets		0		0
Total cost of revenues		0		0
Gross profit		31,350		61,157
Research and development		0		0
Marketing and selling		0		0
General and administrative		0		0
Amortization of Intangible Assets		0		0
Restructuring Charges		0		0
Gain on sale of assets		0		0
Total operating expenses		0		0
Operating (loss) income		31,350		61,157
Interest income		0		0
Interest expense		0		0
Other income, net		0		0
(Loss) income from continuing operations before income taxes		31,350		61,157
Provision for income taxes, net		0		0
(Loss) income from continuing operations, net of tax		31,350		61,157
Income from divested operations		0		0
Income from discontinued operations, net of tax		0		0
Net (loss) income		31,350		61,157
Other Adjustment [Member]
Products		0		0
Services		0		0
Total net revenues		0		0
Products		(262)		(753)
Services		2,004		3,698
Amortization of intangible assets		0		0
Total cost of revenues		1,742		2,945
Gross profit		(1,742)		(2,945)
Research and development		142		(102)
Marketing and selling		(16)		(2,913)
General and administrative		15		293
Amortization of Intangible Assets		1		0
Restructuring Charges		(1,404)		(1,128)
Gain on sale of assets		0		0
Total operating expenses		(1,262)		(3,850)
Operating (loss) income		(480)		905
Interest income		2		30
Interest expense		2		30
Other income, net		0		0
(Loss) income from continuing operations before income taxes		(480)		905
Provision for income taxes, net		(1,839)		310
(Loss) income from continuing operations, net of tax		1,359		595
Income from divested operations		0		0
Income from discontinued operations, net of tax		0		0
Net (loss) income		1,359		595
Discontinued Operations [Member]
Products		(23,305)		(46,101)
Services		0		0
Total net revenues		(23,305)		(46,101)
Products		(18,030)		(33,265)
Services		0
Amortization of intangible assets		0		0
Total cost of revenues		(18,030)		(33,265)
Gross profit		(5,275)		(12,836)
Research and development		(777)		(1,554)
Marketing and selling		(1,156)		(2,312)
General and administrative		(569)		(1,138)
Amortization of Intangible Assets		0		0
Restructuring Charges		0		0
Gain on sale of assets		(9,951)		(9,951)
Total operating expenses		(12,453)		(14,955)
Operating (loss) income		7,178		2,119
Interest income		0		0
Interest expense		0		0
Other income, net		0		0
(Loss) income from continuing operations before income taxes		7,178		2,119
Provision for income taxes, net		0		0
(Loss) income from continuing operations, net of tax		7,178		2,119
Income from divested operations		2,773		7,832
Income from discontinued operations, net of tax		2,773		7,832
Net (loss) income		9,951		9,951
Scenario, Actual [Member]
Products		124,991		252,697
Services		40,485		71,930
Total net revenues		165,476		324,627
Products		50,983		96,465
Services		16,329		30,740
Amortization of intangible assets		644		1,294
Total cost of revenues		67,956		128,499
Gross profit		97,520		196,128
Research and development		26,261		52,721
Marketing and selling		42,282		84,155
General and administrative		13,351		27,699
Amortization of Intangible Assets		1,106		2,717
Restructuring Charges		14,437		14,881
Gain on sale of assets		0		0
Total operating expenses		97,437		182,173
Operating (loss) income		83		13,955
Interest income		16		145
Interest expense		(407)		(750)
Other income, net		12		32
(Loss) income from continuing operations before income taxes		(296)		13,382
Provision for income taxes, net		(936)		1,736
(Loss) income from continuing operations, net of tax		640		11,646
Income from divested operations		2,773		7,832
Income from discontinued operations, net of tax		2,773		7,832
Net (loss) income		3,413		19,478
Income (Loss) from Continuing Operations, Per Basic and Diluted Share		$ 0.02		$ 0.30
Income per share from discontinued operations, net of tax – basic and diluted		$ 0.07		$ 0.20
Net (loss) income per common share - basic and diluted		$ 0.09		$ 0.50
Weighted-average common shares outstanding – basic		38,778		38,720
Weighted-average common shares outstanding – diluted		38,778		38,759
Scenario, Previously Reported [Member]
Products		123,026		242,964
Services		34,405		66,607
Total net revenues		157,431		309,571
Products		69,275		130,483
Services		14,325		27,042
Amortization of intangible assets		644		1,294
Total cost of revenues		84,244		158,819
Gross profit		73,187		150,752
Research and development		26,896		54,377
Marketing and selling		43,454		89,380
General and administrative		13,905		28,544
Amortization of Intangible Assets		1,105		2,717
Restructuring Charges		15,841		16,009
Gain on sale of assets		9,951		9,951
Total operating expenses		111,152		200,978
Operating (loss) income		(37,965)		(50,226)
Interest income		14		115
Interest expense		405		720
Other income, net		12		32
(Loss) income from continuing operations before income taxes		(38,344)		(50,799)
Provision for income taxes, net		903		1,426
(Loss) income from continuing operations, net of tax		(39,247)		(52,225)
Income from divested operations		0		0
Income from discontinued operations, net of tax		0		0
Net (loss) income		$ (39,247)		$ (52,225)
Income (Loss) from Continuing Operations, Per Basic and Diluted Share		$ (1.01)		$ (1.35)
Income per share from discontinued operations, net of tax – basic and diluted		$ 0.00		$ 0.00
Net (loss) income per common share - basic and diluted		$ (1.01)		$ (1.35)
Weighted-average common shares outstanding – basic		38,778		38,720
Weighted-average common shares outstanding – diluted		38,778		38,720