RESTRUCTURING CHARGES - 2011 Restructuring Plan (Details) (USD $)	12 Months Ended					13 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring cost recorded to date						$ 6,900,000
Restructuring charges	5,070,000		1,889,000		(114,000)
Restructuring Reserve - Beginning Balance	2,743,000		1,300,000
Payments	(4,084,000)		(446,000)
Restructuring Reserve, Long Lived Asset Write Off	230,000
Reserve adjustments	106,000		0
Restructuring Reserve - Ending Balance	3,605,000		2,743,000		1,300,000	3,605,000
Restructuring reserve, current	3,437,000		1,230,000			3,437,000
Accrued liabilities, current
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, current	3,400,000					3,400,000
Other liabilities, non current
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, noncurrent	200,000					200,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4,011,000		452,000
Restructuring Reserve - Beginning Balance	82,000		94,000
Payments	(2,190,000)		(370,000)
Restructuring Reserve, Long Lived Asset Write Off	0
Reserve adjustments	102,000		(94,000)
Restructuring Reserve - Ending Balance	2,005,000		82,000			2,005,000
Employee Severance and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4,715,000
Payments	(2,663,000)
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	355,000		1,437,000
Restructuring Reserve - Beginning Balance	2,661,000		1,206,000
Payments	(1,420,000)		(76,000)
Restructuring Reserve, Long Lived Asset Write Off	0
Reserve adjustments	4,000		94,000
Restructuring Reserve - Ending Balance	1,600,000		2,661,000			1,600,000
Contract Termination, Related to Future Rent Obligations
Restructuring Cost and Reserve [Line Items]
Number of vacated leased facilities related to restructuring					3
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	704,000	[1]	0	[1]
Restructuring Reserve - Beginning Balance	0	[1]	0	[1]
Payments	(474,000)	[1]	0	[1]
Restructuring Reserve, Long Lived Asset Write Off	230,000	[1]
Reserve adjustments	0	[1]	0	[1]
Restructuring Reserve - Ending Balance	0	[1]	0	[1]		0	[1]
2011 Restructuring Plan, Remaining Phases | Minimum
Restructuring Cost and Reserve [Line Items]
Estimated restructuring costs	2,000,000
2011 Restructuring Plan, Remaining Phases | Maximum
Restructuring Cost and Reserve [Line Items]
Estimated restructuring costs	$ 3,000,000

[1] Other costs include a $0.2 million charge related to impairments of property and equipment resulting from the transfer of our research, development and prototype production of the Millios system to our facility in Dornstadt, Germany and the consolidation of global manufacturing in our facility in Fremont, California.