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Balance Sheet Details - Additional Information (Detail) $ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 19, 2015 USD ($) | Jun. 30, 2015 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) Product
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Total depreciation expense |  |  |  | $ 13.0 | $ 12.2 | $ 14.6
Amortization of intangible assets |  |  |  | 6.1 | 6.2 | $ 11.6
Number of products no longer actively market | Product |  |  |  |  |  | 2
Machinery and equipment [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Capital leases |  |  |  | 2.6 | 3.2 |
Construction in progress [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Capital leases |  |  |  | 0.1 | $ 0.6 |
NEXoss Synthetic Bone Graft [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Impairment of finite-lived intangibles | $ 0.3 |  |  |  |  |
Epicage interbody fusion device [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Impairment of indefinite-lived intangibles |  | $ 0.9 |  |  |  |
PureGen [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Impairment of indefinite-lived intangibles |  |  |  |  |  | $ 1.3
Physician Education Programs [Member] | Scient'x [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Impairment of indefinite-lived intangibles |  |  | $ 0.9 | $ 0.9 |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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