Fair value measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Jul. 01, 2023	Dec. 31, 2022	Jul. 12, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ 17,958	$ 17,431
CartiHeal Ltd | Sales Milestone
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business combination, contingent consideration, liability			$ 135,000
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities:	17,958	281,566
Fair Value, Recurring | CartiHeal Ltd | Deferred Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current portion of deferred consideration	0	117,615
Contingent consideration	0	79,269
Fair Value, Recurring | CartiHeal Ltd | Sales Milestone
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business combination, contingent consideration, liability	0	67,251
Fair Value, Recurring | Bioness, Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business combination, contingent consideration, liability	17,958	17,431
Fair Value, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities:	17,958	281,566
Fair Value, Recurring | Level 3 | CartiHeal Ltd | Deferred Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current portion of deferred consideration	0	117,615
Contingent consideration	0	79,269
Fair Value, Recurring | Level 3 | CartiHeal Ltd | Sales Milestone
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business combination, contingent consideration, liability	0	67,251
Fair Value, Recurring | Level 3 | Bioness, Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business combination, contingent consideration, liability	$ 17,958	$ 17,431