Income Taxes - Tax rate reconciliation (Details)	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Reconciliation of federal statutory tax rate to effective tax rate
Federal statutory rate	21.00%	21.00%	21.00%
Foreign tax rate benefit	(6.20%)	(16.40%)	(11.10%)
Research and development tax credits	(5.30%)	0.10%	4.20%
Return to provision adjustments	(2.00%)	0.80%
Excess tax benefit of stock-based compensation	(1.10%)	3.70%	0.40%
Change in prior period valuation allowance	(0.30%)	(10.50%)	(0.30%)
Net operating loss not benefited		(6.00%)
Nondeductible (nontaxable) domestic items	0.70%	(2.80%)	(1.40%)
State tax expense	1.20%	(0.80%)	(0.10%)
Nondeductible officer compensation	2.00%	(10.30%)	(1.70%)
Nondeductible (nontaxable) foreign items	4.40%	(7.20%)	(0.20%)
GILTI and Subpart F Income	16.50%	(2.40%)	0.60%
Other	(1.30%)	0.60%	(0.20%)
Effective tax rate	29.60%	(30.20%)	11.20%