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Leases - Summary of Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows used for operating leases $ 260 $ 451
Operating cash flows used for finance leases 14 10
Financing cash flows used for financing leases 120 194
Total 394 655
Right-of-use assets obtained in exchange for obligations:    
Operating leases   2,076
Finance leases 773 341
Total $ 773 $ 2,417