Balance Sheet Account Detail (Goodwill and Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 28,673	[1]	$ 28,866	[1]
Total	40,359
Intangible assets (excluding goodwill), net	43,067		43,465
Developed technology
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	40,100	[2]	40,100	[2]
Accumulated amortization	(382)		(285)
Total	39,718		39,815
License
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	100		100
Accumulated amortization	(78)		(71)
Total	22		29
Customer relationships
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	429	[1]	480	[1]
Accumulated amortization	(393)		(400)
Total	36		80
Acquired Shonin approval
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Finite lived intangibles	1,000	[3]	1,000	[3]
Accumulated amortization	(417)		(167)
Total	583		833
Trademarks and trade names
Goodwill, Finite-lived, and Indefinite-lived Intangible Assets [Line Items]
Indefinite lived intangibles	$ 2,708		$ 2,708

[1] Difference in the value between these dates is solely due to a foreign currency translation adjustment.

[2] Was reclassified in the first quarter of 2013 from in-process research and development to finite lived intangibles, which coincided with the European commercial launch of the product (Nellix EVAS System) associated with this intangible asset. A significant portion of this intangible asset will not begin amortization until the U.S. launch of this product, currently scheduled for 2016.

[3] Regulatory approval for Intuitrak in Japan acquired through an amendment with a distributor in the fourth quarter of 2014.