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Commitments and contingencies - Schedule of Lease, Cost (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 01, 2023
Apr. 02, 2022
Commitments and Contingencies Disclosure [Abstract]    
Operating lease cost $ 1,069 $ 1,126
Short-term lease cost 206 183
Amortization of finance lease assets 235 9
Interest on lease liabilities 137 1
Total lease cost 1,647 1,319
Operating cash flows from operating leases 1,100 1,254
Operating cash flows from financing leases 90 1
Financing cash flows from finance leases 37 13
Operating lease obligations 225 0
Financing lease obligations $ 9,141 $ 0