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Balance Sheet Details - Property and Equipment (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014
Property, Plant and Equipment [Line Items] |  |
Property and equipment, total | $ 93,257 | $ 90,458
Less accumulated depreciation and amortization | (71,312) | (64,418)
Property and equipment, net | $ 21,945 | 26,040
Surgical instruments [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 4 years |
Property and equipment, total | $ 65,723 | 62,872
Machinery and equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 7 years |
Property and equipment, total | $ 15,520 | 15,382
Computer equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 3 years |
Property and equipment, total | $ 3,984 | 3,180
Office furniture and equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 5 years |
Property and equipment, total | $ 3,746 | 3,789
Leasehold improvements [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Various useful life of property and equipment | various |
Property and equipment, total | $ 3,856 | 3,841
Building [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 39 years |
Property and equipment, total | $ 65 | 65
Land [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, total | 9 | 9
Construction in progress [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property and equipment, total | $ 354 | $ 1,320

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