Cross Medical - Additional Information (Detail) - Cross Medical Products, LLC vs. Alphatec Spine, Inc. [Member] $ in Millions		1 Months Ended	12 Months Ended
Aug. 02, 2012 USD ($)	Jan. 31, 2012 USD ($)	Jan. 31, 2011 Installment	Dec. 31, 2015 USD ($)
Guarantees And Letters Of Credit [Line Items]
Contractual obligations		$ 5		$ 3
Number of quarterly payments \| Installment			13
Litigation settlement, quarterly installments, amount	$ 1

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585

Name:	us-gaap_PaymentsForLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration