Business Segment Information - Summary of Net Sales by Geographic Destination for Each Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 112,428	$ 110,985	$ 339,415	$ 288,943
Global Spine [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	86,125	87,816	263,115	228,232
Global Orthopedics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	26,303	23,169	76,300	60,711
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	85,993	89,833	264,572	232,258
U.S. [Member] | Global Spine [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	79,983	83,477	246,815	215,819
U.S. [Member] | Global Orthopedics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,010	6,356	17,757	16,439
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	26,435	21,152	74,843	56,685
International [Member] | Global Spine [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	6,142	4,339	16,300	12,413
International [Member] | Global Orthopedics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 20,293	$ 16,813	$ 58,543	$ 44,272