Business Segment Information - Summary of Non-GAAP Net Margin by Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Non-GAAP net margin	$ 34,294	$ 31,625
General and administrative	19,484	18,282
Research and development	6,937	7,424
Operating income	7,873	5,919
Interest income (expense), net	(183)	45
Other income (expense), net	2,912	(4,348)
Income before income taxes	10,602	1,616
Operating Segments [Member] \| BioStim [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	18,946	17,133
Operating Segments [Member] \| Biologics [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	6,080	6,171
Operating Segments [Member] \| Extremity Fixation [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	8,158	6,412
Operating Segments [Member] \| Spine Fixation [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	1,261	2,007
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	(151)	(98)
Material Reconciling Items [Member]
Segment Reporting Information [Line Items]
General and administrative	19,484	18,282
Research and development	$ 6,937	$ 7,424

Non-GAAP net margin.

No definition available.

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
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-Section S99
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-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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- Definition

The net amount of operating interest income (expense).

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The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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Amount of income (expense) related to nonoperating activities, classified as other.

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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