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		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Products	$ (92,969)	$ (109,684)	$ (291,545)	$ (362,381)
Services	45,924		124,764
Total net revenues	138,893	150,607	416,309	475,234
Products	39,683		115,600
Services	16,372		47,040
Amortization of intangible assets	158		1,310
Total cost of revenues	56,213		163,950
Gross profit	82,680		252,359
Research and development	23,239		70,693
Marketing and selling	31,512		99,324
General and administrative	22,715		54,443
Amortization of intangible assets	660		1,981
Restructuring costs, net	688		2,879
Total operating expenses	78,814		229,320
Operating (loss) income	3,866		23,039
Interest income	76		271
Interest expense	(441)		(1,150)
Other income	2		11
(Loss) income from continuing operations before income taxes	3,503		22,171
Provision for income taxes, net	921		2,147
(Loss) income from continuing operations, net of tax	2,582		20,024
Income from divested operations	0		0
Income from discontinued operations, net of tax	0		0
Net (loss) income	2,582		20,024
Income per share from continuing operations, net of tax – basic and diluted	$ 0.07		$ 0.51
Income per share from discontinued operations, net of tax – basic and diluted	$ 0.00		$ 0.00
Net income per common share - basic and diluted	$ 0.07		$ 0.51
Weighted-average common shares outstanding – diluted	39,076	38,890	39,066	38,819
Restatement Adjustment [Member]
Products		(18,806)		(74,641)
Services		4,626		9,948
Total net revenues		23,432		84,589
Products		0		0
Services		0		0
Amortization of intangible assets		0		0
Total cost of revenues		0		0
Gross profit		23,432		84,589
Research and development		0		0
Marketing and selling		0		0
General and administrative		0		0
Amortization of intangible assets		0		0
Restructuring costs, net		0		0
Loss on divestiture		0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property				0
Total operating expenses		0		0
Operating (loss) income		23,432		84,589
Interest income		0		0
Interest expense		0		0
Other income		0		0
(Loss) income from continuing operations before income taxes		23,432		84,589
Provision for income taxes, net		0		0
(Loss) income from continuing operations, net of tax		23,432		84,589
Gain on divestiture of consumer business		0		0
Income from divested operations				0
Income from discontinued operations, net of tax		0		0
Net (loss) income		23,432		84,589
Other Adjustment [Member]
Products		0		0
Services		0		0
Total net revenues		0		0
Products		(5,955)		(6,707)
Services		1,555		5,253
Amortization of intangible assets		0		0
Total cost of revenues		(4,400)		(1,454)
Gross profit		4,400		1,454
Research and development		108		8
Marketing and selling		(2,688)		(5,609)
General and administrative		363		656
Amortization of intangible assets		0		0
Restructuring costs, net		(2,843)		(3,971)
Loss on divestiture		206
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property				0
Total operating expenses		(4,854)		(8,916)
Operating (loss) income		9,254		10,370
Interest income		1		31
Interest expense		1		31
Other income		0		0
(Loss) income from continuing operations before income taxes		9,254		10,370
Provision for income taxes, net		522		833
(Loss) income from continuing operations, net of tax		8,732		9,537
Gain on divestiture of consumer business		0		0
Income from divested operations				0
Income from discontinued operations, net of tax		0		0
Net (loss) income		8,732		9,537
Discontinued Operations [Member]
Products		0		46,101
Services		0		0
Total net revenues		0		(46,101)
Products		0		(33,265)
Services		0		0
Amortization of intangible assets		0		0
Total cost of revenues		0		(33,265)
Gross profit		0		(12,836)
Research and development		0		(1,554)
Marketing and selling		0		(2,312)
General and administrative		0		(1,138)
Amortization of intangible assets		0		0
Restructuring costs, net		0		0
Loss on divestiture		0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property				(9,745)
Total operating expenses		0		(14,749)
Operating (loss) income		0		1,913
Interest income		0		0
Interest expense		0		0
Other income		0		0
(Loss) income from continuing operations before income taxes		0		1,913
Provision for income taxes, net		0		0
(Loss) income from continuing operations, net of tax		0		1,913
Gain on divestiture of consumer business		37,972		37,972
Income from divested operations				7,832
Income from discontinued operations, net of tax		37,972		45,804
Net (loss) income		37,972		47,717
Scenario, Actual [Member]
Products		(109,684)		(362,381)
Services		40,923		112,853
Total net revenues		150,607		475,234
Products		38,357		134,822
Services		16,662		47,402
Amortization of intangible assets		634		1,928
Total cost of revenues		55,653		184,152
Gross profit		94,954		291,082
Research and development		23,207		75,928
Marketing and selling		33,941		118,096
General and administrative		10,905		38,604
Amortization of intangible assets		782		3,499
Restructuring costs, net		9,831		24,712
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property				0
Total operating expenses		78,666		260,839
Operating (loss) income		16,288		30,243
Interest income		50		195
Interest expense		(405)		(1,155)
Other income		37		69
(Loss) income from continuing operations before income taxes		15,970		29,352
Provision for income taxes, net		1,194		2,930
(Loss) income from continuing operations, net of tax		14,776		26,422
Gain on divestiture of consumer business		37,972		37,972
Income from divested operations		0		7,832
Income from discontinued operations, net of tax		37,972		45,804
Net (loss) income		52,748		72,226
Income per share from continuing operations, net of tax – basic and diluted		$ 0.38		$ 0.68
Income per share from discontinued operations, net of tax – basic and diluted		$ 0.98		$ 1.18
Net income per common share - basic and diluted		$ 1.36		$ 1.86
(Loss) income per share from continuing operations, net of tax – diluted		$ 0.38
Income per share from discontinued operations, net of tax – diluted		$ 0.98
Net (loss) income per common share – diluted		$ 1.36
Weighted Average Number of Shares Outstanding, Basic		38,859		38,767
Weighted-average common shares outstanding – diluted		38,890		38,819
Scenario, Previously Reported [Member]
Products		(90,878)		(333,841)
Services		36,297		102,905
Total net revenues		127,175		436,746
Products		44,312		174,794
Services		15,107		42,149
Amortization of intangible assets		634		1,928
Total cost of revenues		60,053		218,871
Gross profit		67,122		217,875
Research and development		23,099		77,474
Marketing and selling		36,629		126,017
General and administrative		10,542		39,086
Amortization of intangible assets		782		3,499
Restructuring costs, net		12,674		28,683
Loss on divestiture		(206)
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property				9,745
Total operating expenses		83,520		284,504
Operating (loss) income		(16,398)		(66,629)
Interest income		49		164
Interest expense		404		1,124
Other income		37		69
(Loss) income from continuing operations before income taxes		(16,716)		(67,520)
Provision for income taxes, net		672		2,097
(Loss) income from continuing operations, net of tax		(17,388)		(69,617)
Gain on divestiture of consumer business		0		0
Income from divested operations				0
Income from discontinued operations, net of tax		0		0
Net (loss) income		$ (17,388)		$ (69,617)
Income per share from continuing operations, net of tax – basic and diluted				$ (1.80)
Income (Loss) from Continuing Operations, Per Basic Share		$ (0.45)
Income per share from discontinued operations, net of tax – basic and diluted				$ 0.00
Income per share from discontinued operations, net of tax – basic		$ 0.00
Net income per common share - basic and diluted				$ (1.80)
Net (loss) income per common share – basic		$ (0.45)
(Loss) income per share from continuing operations, net of tax – diluted		$ (0.45)
Income per share from discontinued operations, net of tax – diluted		$ 0.00
Net (loss) income per common share – diluted		$ (0.45)
Weighted Average Number of Shares Outstanding, Basic		38,859		38,767
Weighted-average common shares outstanding – diluted		38,859		38,767