Business Segment Information - Summary of EBIDTA by Reporting Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total EBITDA	$ 32,661	$ (2,228)	$ 42,372
Depreciation and amortization	(30,546)	(24,699)	(18,659)
Interest expense, net	(2,483)	(122)	(828)
Income (loss) before income taxes	(368)	(27,049)	22,885
Operating Segments [Member] | Global Spine [Member]
Segment Reporting Information [Line Items]
Total EBITDA	63,036	39,528	76,545
Operating Segments [Member] | Global Extremities [Member]
Segment Reporting Information [Line Items]
Total EBITDA	(4,993)	7,496	9,453
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total EBITDA	$ (25,382)	$ (49,252)	$ (43,626)