Income Taxes - Income before income taxes and provision (benefit) for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Income before income taxes
Domestic	$ (19,491)	$ 2,025	$ 19,777
Foreign	34,792	47,624	52,384
Income before income taxes	15,301	49,649	72,161
Current:
Domestic	1,485	(779)	(8,843)
Foreign	7,803	8,157	5,888
Total Current	9,288	7,378	(2,955)
Deferred:
Domestic	(4,031)	33,624	(8,978)
Foreign	(2,487)	(10,618)	503
Total Deferred	(6,518)	23,006	(8,475)
Provision (benefit) for income taxes	$ 2,770	$ 30,384	$ (11,430)