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Business Segment Information - Summary of EBIDTA by Reporting Segment (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Segment Reporting Information [Line Items]    
Total EBITDA $ 875 $ 15,151
Depreciation and amortization (5,727) (4,369)
Interest expense, net (257) (183)
Income (loss) before income taxes (5,109) 10,599
Operating Segments [Member] | Global Spine [Member]    
Segment Reporting Information [Line Items]    
Total EBITDA 10,575 18,825
Operating Segments [Member] | Global Extremities [Member]    
Segment Reporting Information [Line Items]    
Total EBITDA (173) 3,328
Corporate, Non-Segment [Member]    
Segment Reporting Information [Line Items]    
Total EBITDA $ (9,527) $ (7,002)