Revenue and Allowances - Reserves for Unbilled Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Roll forward of the variable consideration and allowances for unbilled services
Balance at beginning of year	$ 1,364	$ 1,000
Increases to reserves, net of recoveries	9,176	7,574
Amounts written off and foreign currency translation	(9,420)	(7,210)
Balance at end of year	$ 1,120	$ 1,364