Nature of Operations and Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 192,474	$ 181,341
Less: Accumulated Depreciation and Amortization	107,832	95,309
Property, plant and equipment, at cost, net	84,642	86,032
Property, plant, and equipment and finance lease right-of-use asset, depreciation and amortization expense	12,209	12,236	$ 9,386
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,676	7,347
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	60,702	58,509
Machinery, Equipment, and Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	120,804	112,655
Construction in Progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,292	$ 2,830
Minimum | Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (years)	2 years
Minimum | Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (years)	10 years
Maximum | Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (years)	10 years
Maximum | Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (years)	40 years