Property, Plant and Equipment, Net - Schedule of Depreciation Expense and Loss on Disposal of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 01, 2021	Jan. 03, 2020	Dec. 28, 2018
Property Plant And Equipment [Abstract]
Depreciation expense	$ 2,801	$ 3,081	$ 2,430
Loss on disposal of property, plant and equipment	$ 213	$ 14	$ 10

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Name:	us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration