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Commitments and contingencies - Narrative (Details) - USD ($) $ in Thousands									1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 28, 2022	Dec. 23, 2022	Nov. 01, 2022	Nov. 10, 2021	Aug. 19, 2021	Dec. 22, 2020	Aug. 23, 2019	Feb. 09, 2016	Feb. 28, 2021	Apr. 01, 2023	Apr. 02, 2022	Dec. 31, 2022
Loss Contingencies [Line Items]
Loss contingency, damages sought, value									$ 3,000
Stop loss insurance, threshold per member per year										$ 200
Three Injection OA Product
Loss Contingencies [Line Items]
Supply commitment, term								10 years
Supply commitment, renewal term								5 years
HA Product
Loss Contingencies [Line Items]
Collaborative arrangement, upfront payments				$ 853
Collaborative arrangement, amount payable upon transfer of customer data												$ 853
Collaborative arrangement, amount payable upon obtaining product certification				$ 1,707
Collaborative arrangement, royalty percentage, threshold one				5.00%
Collaborative arrangement, sales threshold for royalties				$ 569
Collaborative arrangement, royalty percentage, threshold two				2.50%
Bioness, Inc
Loss Contingencies [Line Items]
Loss contingency, damages sought, percentage of demanded amount to be paid					50.00%
Loss contingency, damages sought, percentage under dispute					50.00%
Litigation settlement, amount awarded to other party		$ 2,500			$ 1,300
Expense of claimant			$ 50
Accrual payments	$ 1,200	$ 1,300
Bioness, Inc
Loss Contingencies [Line Items]
Amount recovered from escrow	$ 1,300
Harbor
Loss Contingencies [Line Items]
Collaborative agreement, royalty percentage							3.00%
Supply commitment, term						8 years
Supplier of Single Injection OA Product
Loss Contingencies [Line Items]
Royalty expense										$ 2,321	$ 3,332
Minimum
Loss Contingencies [Line Items]
Lessee, operating lease, remaining lease term										1 month
Maximum
Loss Contingencies [Line Items]
Lessee, operating lease, remaining lease term										10 years

X

- Definition

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Loss Contingency, Damages Sought, Amount Under Dispute, Percentage Threshold

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Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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