Commitments and contingencies - Schedule of Lease, Cost (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 30, 2024	Apr. 01, 2023
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 888	$ 1,069
Short-term lease cost	80	206
Amortization of finance lease assets	158	235
Interest on lease liabilities	221	137
Total lease cost	1,347	1,647
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	1,178	1,100
Operating cash flows from financing leases	221	90
Financing cash flows from finance leases	183	37
Right-of-use assets obtained in exchange for lease obligations:
Operating lease obligations	95	225
Financing lease obligations	$ 0	$ 9,141

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Right-Of-Use Asset Obtained In Exchange For Lease Liability

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Amount of interest expense on finance lease liability.

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Amount of interest paid on finance lease liability.

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Amount of cash outflow for principal payment on finance lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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