Goodwill and Intangible Assets (Details) - USD ($)	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020	Jan. 02, 2021
Changes in the carrying amount of goodwill
Goodwill	$ 161,200,000		$ 161,080,000
Accumulated goodwill impairment	(71,900,000)		(71,893,000)
Balance at the beginning of the period, Goodwill, net	89,187,000
Foreign currency translation adjustment and other	91,000
Balance at the end of the period, Goodwill, net	89,278,000
Accumulated impairment	(71,900,000)		$ (71,893,000)
Intangible assets impairment losses	$ 0	$ 0