Balance Sheet Details (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Schedule of intangible assets
Gross Carrying Value	$ 4,317	$ 4,317
Accumulated Amortization	(3,694)	(3,609)
Foreign Currency Adjustment	(48)	(39)
Net Carrying Value	575	669
Patents
Schedule of intangible assets
Gross Carrying Value	2,476	2,476
Accumulated Amortization	(1,954)	(1,903)
Foreign Currency Adjustment	0	0
Net Carrying Value	522	573
Developed core technology
Schedule of intangible assets
Gross Carrying Value	1,100	1,100
Accumulated Amortization	(1,100)	(1,100)
Foreign Currency Adjustment	0	0
Net Carrying Value	0	0
Patent license agreement
Schedule of intangible assets
Gross Carrying Value	741	741
Accumulated Amortization	(640)	(606)
Foreign Currency Adjustment	(48)	(39)
Net Carrying Value	$ 53	$ 96