Acquisitions - Summary of Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands				1 Months Ended		12 Months Ended
	Jul. 31, 2020	Mar. 26, 2020	Feb. 06, 2019	Jan. 31, 2019	Apr. 30, 2018	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Assigned Useful Life						9 years
Goodwill						$ 84,018	$ 71,177
In-process Research and Development ("IPR&D") [Member]
Business Acquisition [Line Items]
Assigned Useful Life						Indefinite
Developed Technology [Member]
Business Acquisition [Line Items]
Assigned Useful Life			10 years			10 years
Customer Relationships [Member]
Business Acquisition [Line Items]
Assigned Useful Life	5 years					7 years
Finite lived intangible assets, net acquired	$ 7,340
Tradename [Member]
Business Acquisition [Line Items]
Assigned Useful Life						10 years
Wittenstein [Member] | FITBONE Asset Purchase Agreement [Member]
Business Acquisition [Line Items]
Goodwill		$ 11,300
Wittenstein [Member] | FITBONE Asset Purchase Agreement [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Inventories		528
Total identifiable assets acquired		6,728
Goodwill		11,272
Total fair value of consideration transferred		$ 18,000
Wittenstein [Member] | FITBONE Asset Purchase Agreement [Member] | Trade Name [Member]
Business Acquisition [Line Items]
Assigned Useful Life		15 years
Wittenstein [Member] | FITBONE Asset Purchase Agreement [Member] | Trade Name [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Indefinite lived intangible assets, net acquired		$ 600
Wittenstein [Member] | FITBONE Asset Purchase Agreement [Member] | In-process Research and Development ("IPR&D") [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Indefinite lived intangible assets, net acquired		$ 300
Wittenstein [Member] | FITBONE Asset Purchase Agreement [Member] | Developed Technology [Member]
Business Acquisition [Line Items]
Assigned Useful Life		8 years
Wittenstein [Member] | FITBONE Asset Purchase Agreement [Member] | Developed Technology [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Finite lived intangible assets, net acquired		$ 4,500
Wittenstein [Member] | FITBONE Asset Purchase Agreement [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Assigned Useful Life		15 years
Wittenstein [Member] | FITBONE Asset Purchase Agreement [Member] | Customer Relationships [Member] | Previously Reported [Member]
Business Acquisition [Line Items]
Finite lived intangible assets, net acquired		$ 800
Spinal Kinetics [Member]
Business Acquisition [Line Items]
Inventories					$ 8,175
Indefinite lived intangible assets, net acquired					26,800
Total identifiable assets acquired					62,509
Goodwill					17,612
Total fair value of consideration transferred					76,600	$ 76,600
Cash and cash equivalents					6,785
Restricted cash					30
Accounts receivable					1,705
Prepaid expenses and other current assets					315
Property, plant and equipment					2,285
Other long-term assets					320
Deferred income taxes					3,594
Accounts payable					351
Other current liabilities					2,869
Other long-term liabilities					301
Total liabilities assumed					$ 3,521
Spinal Kinetics [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Assigned Useful Life					N/A
Spinal Kinetics [Member] | In-process Research and Development ("IPR&D") [Member]
Business Acquisition [Line Items]
Assigned Useful Life					Indefinite
Indefinite lived intangible assets, net acquired					$ 26,800
Spinal Kinetics [Member] | Assembled Workforce [Member]
Business Acquisition [Line Items]
Assigned Useful Life					N/A
Spinal Kinetics [Member] | Developed Technology [Member]
Business Acquisition [Line Items]
Assigned Useful Life					10 years
Finite lived intangible assets, net acquired					$ 12,400
Spinal Kinetics [Member] | Tradename [Member]
Business Acquisition [Line Items]
Assigned Useful Life					2 years
Finite lived intangible assets, net acquired					$ 100
Options Medical [Member]
Business Acquisition [Line Items]
Total identifiable assets acquired				$ 6,575
Total fair value of consideration transferred				6,400
Other long-term assets				175
Other current liabilities				69
Other long-term liabilities				106
Total liabilities assumed				$ 175
Options Medical [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Assigned Useful Life				10 years
Indefinite lived intangible assets, net acquired				$ 5,832
Options Medical [Member] | In-process Research and Development ("IPR&D") [Member]
Business Acquisition [Line Items]
Assigned Useful Life				N/A
Options Medical [Member] | Assembled Workforce [Member]
Business Acquisition [Line Items]
Assigned Useful Life				5 years
Indefinite lived intangible assets, net acquired				$ 568