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Merger and acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jan. 05, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Business Acquisition [Line Items]                    
Conversion of stock, shares converted 0.4163                  
Goodwill   $ 194,767           $ 194,767   $ 71,317
Goodwill               123,450    
Pre tax expense       $ 18,300            
Net sales   184,006     $ 113,996     546,226 $ 338,484  
Net loss   (28,857) $ (39,426) $ (60,938) (10,716) $ 2,489 $ (4,460) (129,221) (12,687)  
SeaSpine Holdings Corporation [Member]                    
Business Acquisition [Line Items]                    
Goodwill $ 123,450                  
Adjustment to other current liabilities $ 43,344                  
Direct acquisition-related costs   100           9,900    
Net sales   62,900           188,200    
Net loss   19,200           72,100    
Global Spine [Member]                    
Business Acquisition [Line Items]                    
Goodwill   194,767           194,767   $ 71,317
Goodwill               123,450    
Adjustment to other current liabilities   3,000           3,000    
Net sales   $ 154,352     $ 86,186     $ 461,534 $ 259,623