Leases - Supplemental Balance Sheet Information Related to Finance Leases (Details) - USD ($) $ in Thousands	Oct. 02, 2020	Jan. 03, 2020
Lessee Lease Description [Line Items]
Finance lease right-of-use assets, gross	$ 1,396	$ 2,926
Less accumulated depreciation	756	1,059
Finance lease right-of-use assets, net	640	1,867
Total finance lease liability	$ 495	$ 926
Weighted-average remaining lease term (in years)	1 year	1 year 1 month 6 days
Weighted-average discount rate	3.71%	6.17%
Machinery and Equipment
Lessee Lease Description [Line Items]
Finance lease right-of-use assets, gross	$ 569	$ 1,885
Computer Equipment and Software
Lessee Lease Description [Line Items]
Finance lease right-of-use assets, gross	$ 827	912
Furniture and Fixtures
Lessee Lease Description [Line Items]
Finance lease right-of-use assets, gross		102
Leasehold Improvements
Lessee Lease Description [Line Items]
Finance lease right-of-use assets, gross		$ 27