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Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 28, 2019
Dec. 29, 2018
Payables and Accruals [Abstract]    
Current portion of lease liability $ 13,108 $ 0
Accrued vacation 10,048 7,994
Payroll and related taxes 12,146 8,136
Benefits 4,637 1,598
Unrecognized tax benefits 887 548
Professional liability reserve 1,083 157
Deferred rent 0 779
Other 5,523 1,641
Total $ 47,432 $ 20,853