Acquisition and Divestitures - Summary of Fair Value of Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Jul. 31, 2013 Clinical Instruments [Member]	Aug. 31, 2013 InaVein LLC [Member]
Business Acquisition [Line Items]
Current assets			$ 169	$ 670
Property and equipment, net				154
Intangible assets			322	1,143
Goodwill	15,031	13,749	614	668
Total assets acquired			1,105	2,635
Total liabilities assumed				(100)
Acquisition cost			$ 1,105	$ 2,535

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Amount of assets acquired at the acquisition date.

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Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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