Balance Sheet Account Detail (Goodwill and Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 29,022		$ 27,073
Indefinite lived intangibles	42,808		42,808
Intangible assets (excluding goodwill), net	43,356		43,439
Developed technology
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	0		14,050
Accumulated amortization	0		(13,465)
Finite lived intangibles, net	0		585
Patent
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	100		100
Accumulated amortization	(75)		(54)
Finite lived intangibles, net	25		46
License
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	100		0
Accumulated amortization	(12)		0
Finite lived intangibles, net	88		0
Customer relationships
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	522		0
Accumulated amortization	(87)		0
Finite lived intangibles, net	435		0
In-process research and development
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Indefinite lived intangibles	40,100	[1]	40,100	[1]
Trademarks and trade names
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Indefinite lived intangibles	$ 2,708		$ 2,708

[1] Will be reclassified to finite lived intangibles and amortized through 2025, beginning February 2013, to coincide with the commercial launch of the product (Nellix System) associated with this intangible asset.