Acquisition and Divestitures - Acquired Intangible Assets and Related Estimated Useful Lives (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended		1 Months Ended		1 Months Ended
Sep. 30, 2013	Jul. 31, 2013 Clinical Instruments [Member]	Jul. 31, 2013 Clinical Instruments [Member] Non-compete Agreement [Member]	Jul. 31, 2013 Clinical Instruments [Member] Technology [Member]	Jul. 31, 2013 Clinical Instruments [Member] Customer Relationships [Member]	Aug. 31, 2013 InaVein LLC [Member]	Aug. 31, 2013 InaVein LLC [Member] Non-compete Agreement [Member]	Aug. 31, 2013 InaVein LLC [Member] Technology [Member]	Aug. 31, 2013 InaVein LLC [Member] Customer Relationships [Member]	Aug. 31, 2013 InaVein LLC [Member] Trade Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Allocated fair value		$ 322	$ 95	$ 147	$ 80	$ 1,143	$ 70	$ 354	$ 556	$ 163
Weighted average useful life	7 years 8 months 12 days		5 years	6 years	6 years		5 years	6 years	7 years	8 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration