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Leases - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 27, 2020
Dec. 29, 2019
Dec. 27, 2020
Dec. 29, 2019
Lessee, Lease, Description [Line Items]        
Operating lease expense $ 1.4 $ 1.2 $ 2.8 $ 2.4
Finance lease amortization 0.2   0.4 $ 0.1
Interest expense on finance leases $ 0.1 $ 0.1 $ 0.2  
New York        
Lessee, Lease, Description [Line Items]        
Term of finance lease 49 years   49 years