Summary of Significant Accounting Policies - Allowance for doubtful accounts (Details) - Allowance for doubtful accounts - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 5,514	$ 3,559	$ 3,867
Current provision and adjustments	(879)	3,625	508
Amounts written off	(1,911)	(1,685)	(1,099)
Recoveries and other	89	15	283
Balance at end of period	$ 2,813	$ 5,514	$ 3,559