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Leases - Lease Cost and Supplemental Cash Flow (Details)
$ in Thousands
12 Months Ended
Dec. 28, 2019
USD ($)
Lease, Cost [Abstract]  
Operating lease cost $ 623
Amortization of right-of-use assets 14
Interest on lease liabilities 3
Total finance lease cost 17
Operating cash flows from operating leases 592
Operating cash flows from finance leases 3
Financing cash flows from finance leases 13
Finance leases $ 96