Debt - Interest expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Interest expense related to the notes
Interest Expense, Total	$ 1,527	$ 6,595	$ 4,874	$ 24,405
Convertible Senior Notes
Interest expense related to the notes
Contractual interest expense	826	836	2,511	2,835
Amortization of debt discount		5,076		16,005
Amortization of debt issuance costs	498	380	1,492	1,273
Interest Expense, Total	$ 1,324	$ 6,292	$ 4,003	$ 20,113

Amount of the cost of borrowed funds accounted for as interest expense.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration