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Supplemental Financial Information (Accrued Expense and Other Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Jan. 01, 2019
Jul. 03, 2018
Supplemental Financial Information [Abstract]      
Gift card liability $ 2,398 $ 3,284 $ 300
Occupancy related 1,458 2,600  
Utilities 1,379 1,582  
Deferred revenue 555 0  
Current portion of finance lease liability 510 264  
Other current liabilities 5,379 3,453  
Accrued expenses and other current liabilities $ 11,679 $ 11,183