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